有初一有理数计算题（我要1000道带答案 求50道初一有理数计算题，带答案！
\u6c4250\u9053\u521d\u4e00\u6709\u7406\u6570\u8ba1\u7b97\u9898\uff0c\u8981\u9644\u4e0a\u7b54\u6848\u30021\uff0c\u8ba1\u7b97\uff1a
\uff081\uff09\uff0d5\uff0d9+3\uff1b\uff082\uff0910\uff0d17+8\uff1b
\uff083\uff09\uff0d3\uff0d4+19\uff0d11\uff1b\uff084\uff09\uff0d8+12\uff0d16\uff0d23\u3002
2\uff0c\u8ba1\u7b97\uff1a
(1)-4.2+5.7-8.4+10\uff1b(2)6.1-3.7-4.9+1.8\uff1b3\uff0c\u8ba1\u7b97\uff1a
\uff081\uff09\uff08-36\uff09-\uff08-25\uff09-\uff08+36\uff09+\uff08+72\uff09\uff1b\uff082\uff09\uff08-8\uff09-\uff08-3\uff09+\uff08+5\uff09-\uff08+9\uff09\uff1b
\uff083\uff09\uff1b\uff084\uff09-9+\uff08-3\uff09+3\uff1b
4\uff0c\u8ba1\u7b97\uff1a
\uff081\uff0912\uff0d\uff08\uff0d18\uff09+\uff08\uff0d7\uff09\uff0d15\uff1b
\uff082\uff09\uff0d40\uff0d28\uff0d\uff08\uff0d19\uff09+\uff08\uff0d24\uff09\uff0d\uff08\uff0d32\uff09\uff1b
\uff083\uff094.7\uff0d\uff08\uff0d8.9\uff09\uff0d7.5+\uff08\uff0d6\uff09\uff1b
\u7b54\u6848\uff1a
1\u3001\uff081\uff09\uff0d11\uff1b\uff082\uff091\uff1b\uff083\uff091\uff1b\uff084\uff09\uff0d35
2\u3001\uff081\uff093.1\uff1b\uff082\uff09\uff0d0.7\uff1b\uff083\uff09\uff1b\uff084\uff09
3\u3001\uff081\uff0925\uff1b\uff082\uff09\uff0d9\uff1b\uff083\uff09\uff1b\uff084\uff09\uff0d9
4\u3001\uff081\uff098\uff1b\uff082\uff09\uff0d41\uff1b\uff083\uff090.1
\u6709\u7406\u6570\u7684\u6df7\u5408\u8fd0\u7b97
\u6559\u5b66\u76ee\u6807
1\uff0e\u8fdb\u4e00\u6b65\u638c\u63e1\u6709\u7406\u6570\u7684\u8fd0\u7b97\u6cd5\u5219\u548c\u8fd0\u7b97\u5f8b\uff1b
2\uff0e\u4f7f\u5b66\u751f\u80fd\u591f\u719f\u7ec3\u5730\u6309\u6709\u7406\u6570\u8fd0\u7b97\u987a\u5e8f\u8fdb\u884c\u6df7\u5408\u8fd0\u7b97\uff1b
3\uff0e\u6ce8\u610f\u57f9\u517b\u5b66\u751f\u7684\u8fd0\u7b97\u80fd\u529b\uff0e
\u6559\u5b66\u91cd\u70b9\u548c\u96be\u70b9
\u91cd\u70b9\uff1a\u6709\u7406\u6570\u7684\u6df7\u5408\u8fd0\u7b97\uff0e
\u96be\u70b9\uff1a\u51c6\u786e\u5730\u638c\u63e1\u6709\u7406\u6570\u7684\u8fd0\u7b97\u987a\u5e8f\u548c\u8fd0\u7b97\u4e2d\u7684\u7b26\u53f7\u95ee\u9898\uff0e
\u8bfe\u5802\u6559\u5b66\u8fc7\u7a0b\u8bbe\u8ba1
\u4e00\u3001\u4ece\u5b66\u751f\u539f\u6709\u8ba4\u77e5\u7ed3\u6784\u63d0\u51fa\u95ee\u9898
1\uff0e\u8ba1\u7b97(\u4e94\u5206\u949f\u7ec3\u4e60)\uff1a
(5)-252\uff1b (6)(-2)3\uff1b(7)-7+3-6\uff1b (8)(-3)\u00d7(-8)\u00d725\uff1b
(13)(-616)\u00f7(-28)\uff1b (14)-100-27\uff1b (15)(-1)101\uff1b (16)021\uff1b
(17)(-2)4\uff1b (18)(-4)2\uff1b (19)-32\uff1b (20)-23\uff1b
(24)3.4\u00d7104\u00f7(-5)\uff0e
2\uff0e\u8bf4\u4e00\u8bf4\u6211\u4eec\u5b66\u8fc7\u7684\u6709\u7406\u6570\u7684\u8fd0\u7b97\u5f8b\uff1a
\u52a0\u6cd5\u4ea4\u6362\u5f8b\uff1aa+b=b+a\uff1b
\u52a0\u6cd5\u7ed3\u5408\u5f8b\uff1a(a+b)+c=a+(b+c)\uff1b
\u4e58\u6cd5\u4ea4\u6362\u5f8b\uff1aab=ba\uff1b
\u4e58\u6cd5\u7ed3\u5408\u5f8b\uff1a(ab)c=a(bc)\uff1b
\u4e58\u6cd5\u5206\u914d\u5f8b\uff1aa(b+c)=ab+ac.
\u4e8c\u3001\u8bb2\u6388\u65b0\u8bfe
\u524d\u9762\u6211\u4eec\u5df2\u7ecf\u5b66\u4e60\u4e86\u6709\u7406\u6570\u7684\u52a0\u3001\u51cf\u3001\u4e58\u3001\u9664\u3001\u4e58\u65b9\u7b49\u8fd0\u7b97\uff0c\u82e5\u5728\u4e00\u4e2a\u7b97\u5f0f\u91cc\uff0c\u542b\u6709\u4ee5\u4e0a\u7684\u6df7\u5408\u8fd0\u7b97\uff0c\u6309\u600e\u6837\u7684\u987a\u5e8f\u8fdb\u884c\u8fd0\u7b97\uff1f
1\uff0e\u5728\u53ea\u6709\u52a0\u51cf\u6216\u53ea\u6709\u4e58\u9664\u7684\u540c\u4e00\u7ea7\u8fd0\u7b97\u4e2d\uff0c\u6309\u7167\u5f0f\u5b50\u7684\u987a\u5e8f\u4ece\u5de6\u5411\u53f3\u4f9d\u6b21\u8fdb\u884c\uff0e
\u5ba1\u9898\uff1a(1)\u8fd0\u7b97\u987a\u5e8f\u5982\u4f55\uff1f
(2)\u7b26\u53f7\u5982\u4f55\uff1f
\u8bf4\u660e\uff1a\u542b\u6709\u5e26\u5206\u6570\u7684\u52a0\u51cf\u6cd5\uff0c\u65b9\u6cd5\u662f\u5c06\u6574\u6570\u90e8\u5206\u548c\u5206\u6570\u90e8\u5206\u76f8\u52a0\uff0c\u518d\u8ba1\u7b97\u7ed3\u679c\uff0e\u5e26\u5206\u6570\u5206\u6210\u6574\u6570\u90e8\u5206\u548c\u5206\u6570\u90e8\u5206\u65f6\u7684\u7b26\u53f7\u4e0e\u539f\u5e26\u5206\u6570\u7684\u7b26\u53f7\u76f8\u540c\uff0e
\u8bfe\u5802\u7ec3\u4e60
\u5ba1\u9898\uff1a\u8fd0\u7b97\u987a\u5e8f\u5982\u4f55\u786e\u5b9a\uff1f
\u6ce8\u610f\u7ed3\u679c\u4e2d\u7684\u8d1f\u53f7\u4e0d\u80fd\u4e22\uff0e
\u8bfe\u5802\u7ec3\u4e60
\u8ba1\u7b97\uff1a(1)-2.5\u00d7(-4.8)\u00d7(0.09)\u00f7(-0.27)\uff1b
2\uff0e\u5728\u6ca1\u6709\u62ec\u53f7\u7684\u4e0d\u540c\u7ea7\u8fd0\u7b97\u4e2d\uff0c\u5148\u7b97\u4e58\u65b9\u518d\u7b97\u4e58\u9664\uff0c\u6700\u540e\u7b97\u52a0\u51cf\uff0e
\u4f8b3 \u8ba1\u7b97\uff1a
(1)(-3)\u00d7(-5)2\uff1b (2)\u3014(-3)\u00d7(-5)\u30152\uff1b
(3)(-3)2-(-6)\uff1b (4)(-4\u00d732)-(-4\u00d73)2\uff0e
\u5ba1\u9898\uff1a\u8fd0\u7b97\u987a\u5e8f\u5982\u4f55\uff1f
\u89e3\uff1a(1)(-3)\u00d7(-5)2=(-3)\u00d725=-75\uff0e
(2)\u3014(-3)\u00d7(-5)\u30152=(15)2=225\uff0e
(3)(-3)2-(-6)=9-(-6)=9+6=15\uff0e
(4)(-4\u00d732)-(-4\u00d73)2
=(-4\u00d79)-(-12)2
=-36-144
=-180\uff0e
\u6ce8\u610f\uff1a\u641e\u6e05(1)\uff0c(2)\u7684\u8fd0\u7b97\u987a\u5e8f\uff0c(1)\u4e2d\u5148\u4e58\u65b9\uff0c\u518d\u76f8\u4e58\uff0c(2)\u4e2d\u5148\u8ba1\u7b97\u62ec\u53f7\u5185\u7684\uff0c\u7136\u540e\u518d\u4e58\u65b9\uff0e(3)\u4e2d\u5148\u4e58\u65b9\uff0c\u518d\u76f8\u51cf\uff0c(4)\u4e2d\u7684\u8fd0\u7b97\u987a\u5e8f\u8981\u5206\u6e05\uff0c\u7b2c\u4e00\u9879(-4\u00d732)\u91cc\uff0c\u5148\u4e58\u65b9\u518d\u76f8\u4e58\uff0c\u7b2c\u4e8c\u9879(-4\u00d73)2\u4e2d\uff0c\u5c0f\u62ec\u53f7\u91cc\u5148\u76f8\u4e58\uff0c\u518d\u4e58\u65b9\uff0c\u6700\u540e\u76f8\u51cf\uff0e
\u8bfe\u5802\u7ec3\u4e60
\u8ba1\u7b97\uff1a
(1)-72\uff1b (2)(-7)2\uff1b (3)-(-7)2\uff1b
(7)(-8\u00f723)-(-8\u00f72)3\uff0e
\u4f8b4 \u8ba1\u7b97
(-2)2-(-52)\u00d7(-1)5+87\u00f7(-3)\u00d7(-1)4\uff0e
\u5ba1\u9898\uff1a(1)\u5b58\u5728\u54ea\u51e0\u7ea7\u8fd0\u7b97\uff1f
(2)\u8fd0\u7b97\u987a\u5e8f\u5982\u4f55\u786e\u5b9a\uff1f
\u89e3\uff1a (-2)2-(-52)\u00d7(-1)5+87\u00f7(-3)\u00d7(-1)4
=4-(-25)\u00d7(-1)+87\u00f7(-3)\u00d71(\u5148\u4e58\u65b9)
=4-25-29(\u518d\u4e58\u9664)
=-50\uff0e(\u6700\u540e\u76f8\u52a0)
\u6ce8\u610f\uff1a(-2)2=4\uff0c-52=-25\uff0c(-1)5=-1\uff0c(-1)4=1\uff0e
\u8bfe\u5802\u7ec3\u4e60
\u8ba1\u7b97\uff1a
(1)-9+5\u00d7(-6)-(-4)2\u00f7(-8)\uff1b
(2)2\u00d7(-3)3-4\u00d7(-3)+15\uff0e
3\uff0e\u5728\u5e26\u6709\u62ec\u53f7\u7684\u8fd0\u7b97\u4e2d\uff0c\u5148\u7b97\u5c0f\u62ec\u53f7\uff0c\u518d\u7b97\u4e2d\u62ec\u53f7\uff0c\u6700\u540e\u7b97\u5927\u62ec\u53f7\uff0e
\u8bfe\u5802\u7ec3\u4e60
\u8ba1\u7b97\uff1a
\u4e09\u3001\u5c0f\u7ed3
\u6559\u5e08\u5f15\u5bfc\u5b66\u751f\u4e00\u8d77\u603b\u7ed3\u6709\u7406\u6570\u6df7\u5408\u8fd0\u7b97\u7684\u89c4\u5f8b\uff0e
1\uff0e\u5148\u4e58\u65b9\uff0c\u518d\u4e58\u9664\uff0c\u6700\u540e\u52a0\u51cf\uff1b
2\uff0e\u540c\u7ea7\u8fd0\u7b97\u4ece\u5de6\u5230\u53f3\u6309\u987a\u5e8f\u8fd0\u7b97\uff1b
3\uff0e\u82e5\u6709\u62ec\u53f7\uff0c\u5148\u5c0f\u518d\u4e2d\u6700\u540e\u5927\uff0c\u4f9d\u6b21\u8ba1\u7b97\uff0e
\u56db\u3001\u4f5c\u4e1a
1\uff0e\u8ba1\u7b97\uff1a
2\uff0e\u8ba1\u7b97\uff1a
(1)-8+4\u00f7(-2)\uff1b (2)6-(-12)\u00f7(-3)\uff1b
(3)3�6�1(-4)+(-28)\u00f77\uff1b (4)(-7)(-5)-90\u00f7(-15)\uff1b
3\uff0e\u8ba1\u7b97\uff1a
4\uff0e\u8ba1\u7b97\uff1a
(7)1\u00f7(-1)+0\u00f74-(-4)(-1)\uff1b(8)18+32\u00f7(-2)3-(-4)2\u00d75\uff0e
5*\uff0e\u8ba1\u7b97(\u9898\u4e2d\u7684\u5b57\u6bcd\u5747\u4e3a\u81ea\u7136\u6570)\uff1a
(1)(-12)2\u00f7(-4)3-2\u00d7(-1)2n-1\uff1b
(4)\u3014(-2)4+(-4)2�6�1(-1)7\u30152m�6�1(53+35)\uff0e
\u7b2c\u4e8c\u4efd
\u521d\u4e00\u6570\u5b66\u6d4b\u8bd5\uff08\u516d\uff09
\uff08\u7b2c\u4e00\u7ae0 \u6709\u7406\u6570 2001\u300110\u300118\uff09 \u547d\u9898\u4eba\uff1a\u5b59\u671d\u4ec1 \u5f97\u5206
\u4e00\u3001 \u9009\u62e9\u9898\uff1a\uff08\u6bcf\u98983\u5206\uff0c\u517130\u5206\uff09
1\uff0e|\uff0d5|\u7b49\u4e8e\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff09\uff0d5 \uff08B\uff095 \uff08C\uff09\u00b15 \uff08D\uff090.2
2\uff0e\u5728\u6570\u8f74\u4e0a\u539f\u70b9\u53ca\u539f\u70b9\u53f3\u8fb9\u7684\u70b9\u6240\u8868\u793a\u7684\u6570\u662f\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff09\u6b63\u6570 \uff08B\uff09\u8d1f\u6570 \uff08C\uff09\u975e\u6b63\u6570 \uff08D\uff09\u975e\u8d1f\u6570
3\uff0e\u7528\u4ee3\u6570\u5f0f\u8868\u793a\u201c \u3001b\u4e24\u6570\u79ef\u4e0em\u7684\u5dee\u201d\u662f\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff09 \uff08B\uff09 \uff08C\uff09 \uff08D\uff09
4\uff0e\u5012\u6570\u7b49\u4e8e\u5b83\u672c\u8eab\u7684\u6570\u6709\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff091\u4e2a \uff08B\uff092\u4e2a \uff08C\uff093\u4e2a \uff08D\uff09\u65e0\u6570\u4e2a
5\uff0e\u5728 \uff08n\u662f\u6b63\u6574\u6570\uff09\u8fd9\u516d\u6570\u4e2d\uff0c\u8d1f\u6570\u7684\u4e2a\u6570\u662f\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026( )
\uff08A\uff091\u4e2a \uff08B\uff092\u4e2a \uff08C\uff093\u4e2a \uff08D\uff094\u4e2a
6\uff0e\u82e5\u6570\u8f74\u4e0a\u7684\u70b9A\u3001B\u5206\u522b\u4e0e\u6709\u7406\u6570a\u3001b\u5bf9\u5e94\uff0c\u5219\u4e0b\u5217\u5173\u7cfb\u6b63\u786e\u7684\u662f\uff08 \uff09
\uff08A\uff09a\uff1cb \uff08B\uff09\uff0da\uff1cb \uff08C\uff09|a|\uff1c|b| \uff08D\uff09\uff0da\uff1e\uff0db
�6�1 �6�1 �6�1
7\uff0e\u82e5|a\uff0d2|=2\uff0da\uff0c\u5219\u6570a\u5728\u6570\u8f74\u4e0a\u7684\u5bf9\u5e94\u70b9\u5728
\uff08A\uff09 \u8868\u793a\u65702\u7684\u70b9\u7684\u5de6\u4fa7 \uff08B\uff09\u8868\u793a\u65702\u7684\u70b9\u7684\u53f3\u4fa7\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08C\uff09 \u8868\u793a\u65702\u7684\u70b9\u6216\u8868\u793a\u65702\u7684\u70b9\u7684\u5de6\u4fa7
\uff08D\uff09\u8868\u793a\u65702\u7684\u70b9\u6216\u8868\u793a\u65702\u7684\u70b9\u7684\u5de6\u4fa7
8\uff0e\u8ba1\u7b97 \u7684\u7ed3\u679c\u662f\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff09 \uff08B\uff09 \uff08C\uff09 \uff08D\uff09
9\uff0e\u4e0b\u5217\u8bf4\u6cd5\u6b63\u786e\u7684\u662f\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff09 \u6709\u7406\u6570\u5c31\u662f\u6b63\u6709\u7406\u6570\u548c\u8d1f\u6709\u7406\u6570\uff08B\uff09\u6700\u5c0f\u7684\u6709\u7406\u6570\u662f0
\uff08C\uff09\u6709\u7406\u6570\u90fd\u53ef\u4ee5\u5728\u6570\u8f74\u4e0a\u627e\u5230\u8868\u793a\u5b83\u7684\u4e00\u4e2a\u70b9\uff08D\uff09\u6574\u6570\u4e0d\u80fd\u5199\u6210\u5206\u6570\u5f62\u5f0f
10\uff0e\u4e0b\u5217\u8bf4\u6cd5\u4e2d\u9519\u8bef\u7684\u662f\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff09 \u4efb\u4f55\u6b63\u6574\u6570\u90fd\u662f\u7531\u82e5\u5e72\u4e2a\u201c1\u201d\u7ec4\u6210
\uff08B\uff09 \u5728\u81ea\u7136\u6570\u96c6\u4e2d\uff0c\u603b\u53ef\u4ee5\u8fdb\u884c\u7684\u8fd0\u7b97\u662f\u52a0\u6cd5\u3001\u51cf\u6cd5\u3001\u4e58\u6cd5
\uff08C\uff09 \u4efb\u610f\u4e00\u4e2a\u81ea\u7136\u6570m\u52a0\u4e0a\u6b63\u6574\u6570n\u7b49\u4e8em\u8fdb\u884cn\u6b21\u52a01\u8fd0\u7b97
\uff08D\uff09\u5206\u6570 \u7684\u7279\u5f81\u6027\u8d28\u662f\u5b83\u4e0e\u6570m\u7684\u4e58\u79ef\u6b63\u597d\u7b49\u4e8en
\u4e8c\u3001 \u586b\u7a7a\u9898\uff1a\uff08\u6bcf\u98984\u5206\uff0c\u517132\u5206\uff09
11\uff0e\uff0d0.2\u7684\u76f8\u53cd\u6570\u662f \uff0c\u5012\u6570\u662f \u3002
12\uff0e\u51b0\u7bb1\u51b7\u85cf\u5ba4\u7684\u6e29\u5ea6\u662f3\u2103\uff0c\u51b7\u51bb\u5ba4\u7684\u6e29\u5ea6\u6bd4\u51b7\u85cf\u5ba4\u7684\u6e29\u5ea6\u4f4e15\u2103\uff0c\u5219\u51b7\u51bb\u5ba4\u6e29\u5ea6\u662f \u2103\u3002
13\uff0e\u7d27\u63a5\u5728\u5947\u6570a\u540e\u9762\u7684\u4e09\u4e2a\u5076\u6570\u662f \u3002
14\uff0e\u7edd\u5bf9\u503c\u4e0d\u5927\u4e8e4\u7684\u8d1f\u6574\u6570\u662f \u3002
15\uff0e\u8ba1\u7b97\uff1a = \u3002
16\uff0e\u82e5a\uff1c0\uff0cb\uff1e0\uff0c|a|\uff1e|b|\uff0c\u5219a+b 0\u3002\uff08\u586b\u201c\uff1e\u201d\u6216\u201c=\u201d\u6216\u201c\uff1c\u201d\u53f7\uff09
17\uff0e\u5728\u62ec\u53f7\u5185\u7684\u6a2a\u7ebf\u4e0a\u586b\u5199\u9002\u5f53\u7684\u9879\uff1a2x\uff0d(3a\uff0d4b+c)=(2x\uff0d3a)\uff0d( )\u3002
18\uff0e\u89c2\u5bdf\u4e0b\u5217\u7b97\u5f0f\uff0c\u4f60\u5c06\u53d1\u73b0\u5176\u4e2d\u7684\u89c4\u5f8b\uff1a \uff1b \uff1b \uff1b \uff1b \uff1b\u2026\u2026\u8bf7\u7528\u540c\u4e00\u4e2a\u5b57\u6bcd\u8868\u793a\u6570\uff0c\u5c06\u4e0a\u8ff0\u5f0f\u5b50\u4e2d\u7684\u89c4\u5f8b\u7528\u7b49\u5f0f\u8868\u793a\u51fa\u6765\uff1a \u3002
\u4e09\u3001 \u8ba1\u7b97\uff08\u5199\u51fa\u8ba1\u7b97\u8fc7\u7a0b\uff09\uff1a\uff08\u6bcf\u98987\u5206\uff0c\u517128\u5206\uff09
19\uff0e 20\uff0e
21\uff0e \uff08n\u4e3a\u6b63\u6574\u6570\uff09
22\uff0e
\u56db\u3001\u82e5 \u3002\uff081\uff09\u6c42a\u3001b\u7684\u503c\uff1b\uff08\u672c\u98984\u5206\uff09
\uff082\uff09\u6c42 \u7684\u503c\u3002\uff08\u672c\u98986\u5206\uff09
\u7b2c\u4e09\u4efd
\u521d\u4e00\u6570\u5b66\u6d4b\u8bd5\uff08\u516d\uff09
\uff08\u7b2c\u4e00\u7ae0 \u6709\u7406\u6570 2001\u300110\u300118\uff09 \u547d\u9898\u4eba\uff1a\u5b59\u671d\u4ec1
\u73ed\u7ea7 \u59d3\u540d \u5f97\u5206
\u4e00\u3001 \u9009\u62e9\u9898\uff1a\uff08\u6bcf\u98983\u5206\uff0c\u517130\u5206\uff09
1\uff0e|-5|\u7b49\u4e8e\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff09-5 \uff08B\uff095 \uff08C\uff09\u00b15 \uff08D\uff090.2
2\uff0e\u5728\u6570\u8f74\u4e0a\u539f\u70b9\u53ca\u539f\u70b9\u53f3\u8fb9\u7684\u70b9\u6240\u8868\u793a\u7684\u6570\u662f\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff09\u6b63\u6570 \uff08B\uff09\u8d1f\u6570 \uff08C\uff09\u975e\u6b63\u6570 \uff08D\uff09\u975e\u8d1f\u6570
3\uff0e\u7528\u4ee3\u6570\u5f0f\u8868\u793a\u201c \u3001b\u4e24\u6570\u79ef\u4e0em\u7684\u5dee\u201d\u662f\u2026\u2026\u2026\u2026\u2026\u2026\uff08 \uff09
\uff08A\uff09 \uff08B\uff09 \uff08C\uff09 \uff08D\uff09
4\uff0e\uff0d12+11\uff0d8+39=\uff08\uff0d12\uff0d8\uff09+\uff0811+39\uff09\u662f\u5e94\u7528\u4e86 \uff08 \uff09
A\u3001\u52a0\u6cd5\u4ea4\u6362\u5f8bB\u3001\u52a0\u6cd5\u7ed3\u5408\u5f8b C\u3001\u52a0\u6cd5\u4ea4\u6362\u5f8b\u548c\u7ed3\u5408\u5f8bD\u3001\u4e58\u6cd5\u5206\u914d\u5f8b
5\uff0e\u5c066\uff0d(+3)\uff0d(\uff0d7)+(\uff0d2)\u6539\u5199\u6210\u7701\u7565\u52a0\u53f7\u7684\u548c\u5e94\u662f ( )
A\u3001\uff0d6\uff0d3+7\uff0d2 B\u30016\uff0d3\uff0d7\uff0d2 C\u30016\uff0d3+7\uff0d2 D\u30016+3\uff0d7\uff0d2
6\uff0e\u82e5|x|=3\uff0c|y|=7\uff0c\u5219x\uff0dy\u7684\u503c\u662f \uff08 \uff09
A\u3001\u00b14 B\u3001\u00b110 C\u3001\uff0d4\u6216\uff0d10 D\u3001\u00b14\uff0c\u00b110
7\uff0e\u82e5a\u00d7b\uff1c0\uff0c\u5fc5\u6709 \uff08 \uff09
A\u3001a\uff1e0\uff0cb\uff1c0 B\u3001a\uff1c0\uff0cb\uff1e0 C\u3001a\u3001b\u540c\u53f7 D\u3001a\u3001b\u5f02\u53f7
8\uff0e\u5982\u679c\u4e24\u4e2a\u6709\u7406\u6570\u7684\u548c\u662f\u6b63\u6570\uff0c\u79ef\u662f\u8d1f\u6570\uff0c\u90a3\u4e48\u8fd9\u4e24\u4e2a\u6709\u7406\u6570 \uff08 \uff09
A\u3001\u90fd\u662f\u6b63\u6570 B\u3001\u7edd\u5bf9\u503c\u5927\u7684\u90a3\u4e2a\u6570\u6b63\u6570\uff0c\u53e6\u4e00\u4e2a\u662f\u8d1f\u6570
C\u3001\u90fd\u662f\u8d1f\u6570 D\u3001\u7edd\u5bf9\u503c\u5927\u7684\u90a3\u4e2a\u6570\u8d1f\u6570\uff0c\u53e6\u4e00\u4e2a\u662f\u6b63\u6570
9\uff0e\u6587\u5177\u5e97\u3001\u4e66\u5e97\u548c\u73a9\u5177\u5e97\u4f9d\u6b21\u5ea7\u843d\u5728\u4e00\u6761\u4e1c\u897f\u8d70\u5411\u7684\u5927\u8857\u4e0a\uff0c\u6587\u5177\u5e97\u5728\u4e66\u5e97\u897f\u8fb920\u7c73\u5904\uff0c\u73a9\u5177\u5e97\u4f4d\u4e8e\u4e66\u5e97\u4e1c\u8fb9100\u7c73\u5904\uff0c\u5c0f\u660e\u4ece\u4e66\u5e97\u6cbf\u8857\u5411\u4e1c\u8d70\u4e8640\u7c73\uff0c\u63a5\u7740\u53c8\u5411\u4e1c\u8d70\u4e86\uff0d60\u7c73\uff0c\u6b64\u65f6\u5c0f\u660e\u7684\u4f4d\u7f6e\u5728 \uff08 \uff09
A\u3001\u6587\u5177\u5e97 B\u3001\u73a9\u5177\u5e97 C\u3001\u6587\u5177\u5e97\u897f\u8fb940\u7c73 D\u3001\u73a9\u5177\u5e97\u4e1c\u8fb9\uff0d60\u7c73
10\uff0e\u5df2\u77e5\u6709\u7406\u6570 \u3001 \u5728\u6570\u8f74\u4e0a\u7684\u4f4d\u7f6e\u5982\u56fe �6�1 �6�1 �6�1
\u6240\u793a\uff0c\u90a3\u4e48\u5728\u2460a\uff1e0\uff0c\u2461\uff0db\uff1c0\uff0c\u2462a\uff0db\uff1e0\uff0c
\u2463a+b\uff1e0\u56db\u4e2a\u5173\u7cfb\u5f0f\u4e2d\uff0c\u6b63\u786e\u7684\u6709 \uff08 \uff09
A\u30014\u4e2a B\u30013\u4e2a C\u30012\u4e2a D\u30011\u4e2a
\u4e8c\u3001 \u5224\u65ad\u9898\uff1a\uff08\u5bf9\u7684\u753b\u201c+\u201d\uff0c\u9519\u7684\u753b\u201c\u25cb\u201d\uff0c\u6bcf\u98981\u5206\uff0c\u51716\u5206\uff09
11\uff0e0.3\u65e2\u4e0d\u662f\u6574\u6570\u53c8\u4e0d\u662f\u5206\u6570\uff0c\u56e0\u800c\u5b83\u4e5f\u4e0d\u662f\u6709\u7406\u6570\u3002 \uff08 \uff09
12\uff0e\u4e00\u4e2a\u6709\u7406\u6570\u7684\u7edd\u5bf9\u503c\u7b49\u4e8e\u8fd9\u4e2a\u6570\u7684\u76f8\u53cd\u6570\uff0c\u8fd9\u4e2a\u6570\u662f\u8d1f\u6570\u3002 \uff08 \uff09
13\uff0e\u6536\u5165\u589e\u52a05\u5143\u8bb0\u4f5c+5\u5143\uff0c\u90a3\u4e48\u652f\u51fa\u51cf\u5c115\u5143\u8bb0\u4f5c\uff0d5\u5143\u3002 \uff08 \uff09
14\uff0e\u82e5a\u662f\u6709\u7406\u6570\uff0c\u5219\uff0da\u4e00\u5b9a\u662f\u8d1f\u6570\u3002 \uff08 \uff09
15\uff0e\u96f6\u51cf\u53bb\u4e00\u4e2a\u6709\u7406\u6570\uff0c\u4ecd\u5f97\u8fd9\u4e2a\u6570\u3002 \uff08 \uff09
16\uff0e\u51e0\u4e2a\u6709\u7406\u6570\u76f8\u4e58\uff0c\u82e5\u8d1f\u56e0\u6570\u7684\u4e2a\u6570\u4e3a\u5947\u6570\u4e2a\uff0c\u5219\u79ef\u4e3a\u8d1f\u3002 \uff08 \uff09
\u4e09\u3001 \u586b\u7a7a\u9898\uff1a\uff08\u6bcf\u98983\u5206\uff0c\u517118\u5206\uff09
17\uff0e\u5728\u62ec\u53f7\u5185\u586b\u4e0a\u9002\u5f53\u7684\u9879\uff0c\u4f7f\u7b49\u5f0f\u6210\u7acb\uff1aa+b\uff0dc+d=a+b\uff0d\uff08 \uff09\u3002
18\uff0e\u6bd4\u8f83\u5927\u5c0f: \u2502\uff0d \u2502 \u2502\uff0d \u2502.(\u586b\u201c\uff1e\u201d\u6216\u201c\uff1c\u201d\u53f7)
19\uff0e\u5982\u56fe\uff0c\u6570\u8f74\u4e0a\u6807\u51fa\u7684\u70b9\u4e2d\u4efb\u610f\u76f8\u90bb\u4e24\u70b9\u95f4\u7684\u8ddd\u79bb\u90fd\u76f8\u7b49\uff0c\u5219a\u7684\u503c= \u3002
�6�1 �6�1 �6�1 �6�1 �6�1 �6�1 �6�1 �6�1 �6�1
20\uff0e\u4e00\u4e2a\u52a0\u6570\u662f0.1\uff0c\u548c\u662f\uff0d27.9\uff0c\u53e6\u4e00\u4e2a\u52a0\u6570\u662f \u3002
21\uff0e\uff0d9\uff0c+6\uff0c\uff0d3\u4e09\u6570\u7684\u548c\u6bd4\u5b83\u4eec\u7684\u7edd\u5bf9\u503c\u7684\u548c\u5c0f \u3002
22\uff0e\u7b49\u5f0f \u00d7\u3014\uff08\uff0d5\uff09+\uff08\uff0d13\uff09\u3015= \u6839\u636e\u7684\u8fd0\u7b97\u5f8b\u662f \u3002
\u56db\u3001 \u5728\u4e0b\u5217\u6a2a\u7ebf\u4e0a\uff0c\u76f4\u63a5\u586b\u5199\u7ed3\u679c\uff1a\uff08\u6bcf\u98982\u5206\uff0c\u517112\u5206\uff09
23\uff0e\uff0d2+3= \uff1b24\uff0e\uff0d27+(\uff0d51)= \uff1b 25\uff0e\uff0d18\uff0d34= \uff1b
26\uff0e\uff0d24\uff0d(\uff0d17)= \uff1b27\uff0e\uff0d14\u00d75= \uff1b 28\uff0e\uff0d18\u00d7(\uff0d2)= \u3002
\u4e94\u3001 \u8ba1\u7b97\uff08\u5199\u51fa\u8ba1\u7b97\u8fc7\u7a0b\uff09\uff1a\uff0829\u300130\u6bcf\u98986\u5206\uff0c31\u300132\u6bcf\u98987\u5206\uff0c\u517126\u5206\uff09
29\uff0e(\uff0d6)\uff0d(\uff0d7)+(\uff0d5)\uff0d(+9) 30\uff0e
31\uff0e 32\uff0e(\uff0d5)\u00d7(\uff0d3 )\uff0d15\u00d71 +\u3014 \uff0d( )\u00d724\u3015
\u516d\u3001 \u4e0b\u8868\u5217\u51fa\u4e86\u56fd\u5916\u51e0\u4e2a\u57ce\u5e02\u4e0e\u5317\u4eac\u7684\u65f6\u5dee\uff08\u5e26\u6b63\u53f7\u7684\u6570\u8868\u793a\u540c\u4e00\u65f6\u523b\u6bd4\u5317\u4eac\u65f6\u95f4\u65e9\u7684\u65f6\u6570\uff09\u3002
\u2474\u5982\u679c\u73b0\u5728\u7684\u5317\u4eac\u65f6\u95f4\u662f7\uff1a00\uff0c\u90a3\u4e48\u73b0\u5728\u7684\u7ebd\u7ea6\u65f6\u95f4\u662f\u591a\u5c11\uff1f
\u2475\u5c0f\u534e\u73b0\u5728\u60f3\u7ed9\u8fdc\u5728\u5df4\u9ece\u7684\u5916\u516c\u6253\u7535\u8bdd\uff0c\u4f60\u8ba4\u4e3a\u5408\u9002\u5417\uff1f\uff08\u6bcf\u5c0f\u98984\u5206\uff09
*\u662f\u4e58\u53f7\u3002
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
\u6709\u7406\u6570\u7684\u52a0\u51cf\u6df7\u5408\u8fd0\u7b97
\u3010\u3010\u540c\u6b65\u8fbe\u7eb2\u7ec3\u4e60\u3011
1\uff0e\u9009\u62e9\u9898\uff1a
\uff081\uff09\u628a-2-\uff08+3\uff09-\uff08-5\uff09+\uff08-4\uff09+\uff08+3\uff09\u5199\u6210\u7701\u7565\u62ec\u53f7\u548c\u7684\u5f62\u5f0f\uff0c\u6b63\u786e\u7684\u662f\uff08 \uff09
A\uff0e-2-3-5-4+3 B\uff0e-2+3+5-4+3
C\uff0e-2-3+5-4+3 D\uff0e-2-3-5+4+3
\uff082\uff09\u8ba1\u7b97\uff08-5\uff09-\uff08+3\uff09+\uff08-9\uff09-\uff08-7\uff09+ \u6240\u5f97\u7ed3\u679c\u6b63\u786e\u7684\u662f\uff08 \uff09
A\uff0e-10 B\uff0e-9 C\uff0e8 D\uff0e-23
\uff083\uff09-7\uff0c-12\uff0c+2\u7684\u4ee3\u6570\u548c\u6bd4\u5b83\u4eec\u7684\u7edd\u5bf9\u503c\u7684\u548c\u5c0f\uff08 \uff09
A\uff0e-38 B\uff0e-4 C\uff0e4 D\uff0e38
\uff084\uff09\u82e5 +\uff08b+3\uff092=0,\u5219b%
悬赏分：0 - 提问时间2008-10-3 17:10
带答案，最好是负数与正数的加减
提问者： 流浪儿走 - 试用期 一级
其他回答 共 3 条
初一数学有理数的混合运算练习
【同步达纲练习】（时间45分钟，满分100分）
1．计算题：（10′×5=50′）
（1）3．28-4．76+1 - ；
（2）2．75-2 -3 +1 ；
（3）42÷（-1 ）-1 ÷（-0.125）;
（4）(-48) ÷82-(-25) ÷(-6)2;
（5）- +( )×(-2.4).
2.计算题：（10′×5=50′）
（1）-23÷1 ×（-1 ）2÷（1 ）2；
（2）-14-（2-0.5）× ×[( )2-( )3];
（3）-1 ×[1-3×(- )2]-( )2×(-2)3÷(- )3
（4）(0.12+0.32) ÷ [-22+(-3)2-3 × ];
(5)-6.24×32+31.2×(-2)3+(-0.51) ×624.
【素质优化训练】
1.填空题：
(1)如是 ，那么ac 0；如果 ，那么ac 0;
(2)若 ，则abc= ; -a2b2c2= ;
(3)已知a，b互为相反数，c，d互为倒数，x的绝对值等于2，那么x2-(a+b)+cdx= .
2．计算：
（1）-32-
（2）{1+[ ]×(-2)4}÷(- );
（3）5-3×{-2+4×[-3×(-2)2-(-4) ÷(-1)3]-7}.
【生活实际运用】
甲用1000元人民币购买了一手股票，随即他将这手股票转卖给乙，获利10%，而后乙又将这手股票反卖给甲，但乙损失了10%.最后甲按乙卖给甲的价格的九折将这手股票卖给了乙，在上述股票交易中（ ）
A．甲刚好亏盈平衡； B．甲盈利1元；
C．甲盈利9元； D．甲亏本1.1元.
参考答案：
【同步达纲练习】
1．（1）-0.73 （2）-1 ; （3）-14; （4）- ; （5）-2.9
2．(1)-3 (2)-1 ; (3)- ; (4)1; (5)-624.
【素质优化训练】
1.(1)>，>; (2)24，-576; (3)2或6.[提示：∵ =2 ∴x2=4，x=±2]. 2.(1)-31; (2)-8 (3)224
【生活实际运用】 B
参考资料： http://edu.jx163.com/edu2/test/attche/site327/20070124/00e04c793857072105990c.doc
回答者： 朂àì还遈哲 - 试用期 一级 10-4 10:07
75÷〔138÷（100-54）〕 85×(95－1440÷24)
80400－(4300＋870÷15) 240×78÷（154-115）
1437×27＋27×563 〔75-（12+18）〕÷15
2160÷〔（83-79）×18〕 280＋840÷24×5
325÷13×(266－250) 85×(95－1440÷24)
58870÷(105＋20×2) 1437×27＋27×563
81432÷(13×52＋78) [37.85-（7.85+6.4）] ×30
156×[(17.7-7.2)÷3] （947－599）＋76×64
36×(913－276÷23) [192－（54＋38）]×67
[（7.1-5.6）×0.9-1.15]÷2.5 81432÷(13×52＋78)
5.4÷[2.6×（3.7-2.9）+0.62] （947－599）＋76×64 60－(9.5＋28.9)]÷0.18 2.881÷0.43－0.24×3.5 20×[(2.44－1.8)÷0.4＋0.15] 28-(3.4 1.25×2.4) 0.8×〔15.5-(3.21 5.79)〕 （31.8 3.2×4）÷5 194－64.8÷1.8×0.9 36.72÷4.25×9.9 3.416÷（0.016×35） 0.8×[(10－6.76)÷1.2]
（136+64）×（65-345÷23） (6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8 （58+37）÷（64-9×5）
812-700÷（9+31×11） （3.2×1.5+2.5）÷1.6
85+14×（14+208÷26） 120-36×4÷18+35
（284+16）×（512-8208÷18） 9.72×1.6-18.305÷7
4/7÷[1/3×（3/5-3/10）] （4/5+1/4）÷7/3+7/10
12.78－0÷（ 13.4＋156.6 ） 37.812-700÷（9+31×11） （136+64）×（65-345÷23） 3.2×（1.5+2.5）÷1.6
85+14×（14+208÷26） （58+37）÷（64-9×5）
(6.8-6.8×0.55)÷8.5 （284+16）×（512-8208÷18）
0.12× 4.8÷0.12×4.8 （3.2×1.5+2.5）÷1.6
120-36×4÷18+35 10.15-10.75×0.4-5.7
5.8×（3.87-0.13）+4.2×3.74 347+45×2-4160÷52
32.52-（6+9.728÷3.2）×2.5 87（58+37）÷（64-9×5）
[（7.1-5.6）×0.9-1.15] ÷2.5 （3.2×1.5+2.5）÷1.6
5.4÷[2.6×（3.7-2.9）+0.62] 12×6÷（12-7.2）-6
3.2×6+（1.5+2.5）÷1.6 （3.2×1.5+2.5）÷1.6
5.8×（3.87-0.13）+4.2×3.74
33.02－（148.4－90.85）÷2.5
回答者： 754791551 - 魔法学徒 一级 10-5 13:26
(一)计算题:
(1)23+(-73)
(2)(-84)+(-49)
(3)7+(-2.04)
(4)4.23+(-7.57)
(5)(-7/3)+(-7/6)
(6)9/4+(-3/2)
(7)3.75+(2.25)+5/4
(8)-3.75+(+5/4)+(-1.5)
(9)(-17/4)+(-10/3)+(+13/3)+(11/3)
(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
(11)(+1.3)-(+17/7)
(12)(-2)-(+2/3)
(13)|(-7.2)-(-6.3)+(1.1)|
(14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)
(15)(-2/199)*(-7/6-3/2+8/3)
(16)4a)*(-3b)*(5c)*1/6
还有50道题，不过没有答案
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -（ 3/2 + 4/5 ）
8. 7/8 + （ 1/8 + 1/9 ）
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
0.12χ＋1.8×0.9=7.2 (9－5χ)×0.3=1.02 6.4χ-χ=28+4.4
11. 7 × 5/49 + 3/14
12. 6 ×（ 1/2 + 2/3 ）
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - （ 2/7 – 10/21 ）
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50＋160÷40 （58+370）÷（64-45）
32.120-144÷18+35
33.347+45×2-4160÷52
34（58+37）÷（64-9×5）
35.95÷（64-45）
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷（9+31×11） （136+64）×（65-345÷23）
38.85+14×（14+208÷26）
39.（284+16）×（512-8208÷18）
40.120-36×4÷18+35
41.（58+37）÷（64-9×5）
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.（3.2×1.5+2.5）÷1.6 （2）3.2×（1.5+2.5）÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×（4.8-1.2×4）= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×（3.87-0.13）+4.2×3.74
50.32.52-（6+9.728÷3.2）×2.5
51.-5+58+13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/(1/3)+79/(3+6/4）
54.123+456+789+98/(-4)
55.369/33-(-54-31/15.5)
56.39+{3x[42/2x(3x8)]}
57.9x8x7/5x(4+6)
58.11x22/(4+12/2)
59.94+(-60)/10
1.
a^3-2b^3+ab(2a-b)
=a^3+2a^2b-2b^3-ab^2
=a^2(a+2b)-b^2(2b+a)
=(a+2b)(a^2-b^2)
=(a+2b)(a+b)(a-b)
2.
(x^2+y^2)^2-4y(x^2+y^2)+4y^2
=(x^2+y^2-2y)^2
3.
(x^2+2x)^2+3(x^2+2x)+x^2+2x+3
=(x^2+2x)^2+4(x^2+2x)+3
=(x^2+2x+3)(x^2+2x+1)
=(x^2+2x+3)(x+1)^2
4.
(a+1)(a+2)+(2a+1)(a-2)-12
=a^2+3a+2+2a^2-3a-2-12
=3a^2-12
=3(a+2)(a-2)
5.
x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2
=[x(y+z)-y(x-z)]^2
=(xz+yz)^2
=z^2(x+y)^2
6.
3(a+2)^2+28(a+2)-20
=[3(a+2)-2][(a+2)+10]
=(3a+4)(a+12)
7.
(a+b)^2-(b-c)^2+a^2-c^2
=(a+b)^2-c^2+a^2-(b-c)^2
=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)
=(a+b-c)(a+b+c+a-b+c)
=2(a+b-c)(a+c)
8.
x(x+1)(x^2+x-1)-2
=(x^2+x)(x^2+x-1)-2
=(x^2+x)^2-(x^2+x)-2
=(x^2+x-2)(x^2+x+1)
=(x+2)(x-1)(x^2+x+1)
(二)填空题:
(1)零减去a的相反数,其结果是_____________; (2)若a-b>a,则b是_____________数; (3)从-3.14中减去-π,其差应为____________; (4)被减数是-12(4/5),差是4.2,则减数应是_____________; (5)若b-a<-,则a,b的关系是___________,若a-b<0,则a,b的关系是______________; (6)(+22/3)-( )=-7
(三)判断题:
(1)一个数减去一个负数,差比被减数小. (2)一个数减去一个正数,差比被减数小. (3)0减去任何数,所得的差总等于这个数的相反数. (4)若X+(-Y)=Z,则X=Y+Z (5)若a<0,b|b|,则a-b>0
一)选择题:
(1)已知a,b是两个有理数,如果它们的商a/b=0,那么( ) (A)a=0且b≠0 (B)a=0 (C)a=0或b=0 (D)a=0或b≠0 (2)下列给定四组数1和1;-1和-1;0和0;-2/3和-3/2,其中互为倒数的是( ) (A)只有 (B)只有 (C)只有 (D)都是 (3)如果a/|b|(b≠0)是正整数,则( ) (A)|b|是a的约数 (B)|b|是a的倍数 (C)a与b同号 (D)a与b异号 (4)如果a>b,那么一定有( ) (A)a+b>a (B)a-b>a (C)2a>ab (D)a/b>1
(二)填空题:
(1)当|a|/a=1时,a______________0;当|a|/a=-1时,a______________0;(填>,0,则a___________0; (11)若ab/c0,则b___________0; (12)若a/b>0,b/c(-0.3)4>-106 (B)(-0.3)4>-106>(-0.2)3 (C)-106>(-0.2)3>(-0.3)4 (D)(-0.3)4>(-0.2)3>-106 (4)若a为有理数,且a2>a,则a的取值范围是( ) (A)a<0 (B)0<1 (C)a1 (D)a>1或a<0 (5)下面用科学记数法表示106000,其中正确的是( ) (A)1.06*105 (B)10.6*105 (C)1.06*106 (D)0.106*107 (6)已知1.2363=1.888,则123.63等于( ) (A)1888 (B)18880 (C)188800 (D)1888000 (7)若a是有理数,下列各式总能成立的是( ) (A)(-a)4=a4 (B)(-a)3=A4 (C)-a4=(-a)4 (D)-a3=a3 (8)计算:(-1)1-(-2)2-(-3)3-(-4)4所得结果是( ) (A)288 (B)-288 (C)-234 (D)280
(二)填空题:
(1)在23中,3是________,2是_______,幂是________;若把3看作幂,则它的底数是________,
指数是________; (2)根据幂的意义:(-2)3表示________相乘; (-3)2v表示________相乘;-23表示________. (3)平方等于36/49的有理数是________;立方等于-27/64的数是________ (4)把一个大于10的正数记成a*10n(n为正整数)的形成,a的范围是________,这里n比原来的整
数位数少_________,这种记数法称为科学记数法; (5)用科学记数法记出下面各数:4000=___________;950000=________________;地球
的质量约为49800...0克(28位),可记为________; (6)下面用科学记数法记出的数,原来各为多少 105=_____________;2*105=______________; 9.7*107=______________9.756*103=_____________ (7)下列各数分别是几位自然数 7*106是______位数 1.1*109是________位数; 3.78*107是______位数 1010是________位数; (8)若有理数m 0,b0 (B)a-|b|>0 (C)a2+b3>0 (D)a<0 (6)代数式(a+2)2+5取得最小值时的a值为( ) (A)a=0 (B)a=2 (C)a=-2 (D)a0 (B)b-a>0 (C)a,b互为相反数; (D)-ab (C)a
(5)用四舍五入法得到的近似数1.20所表示的准确数a的范围是( )
(A)1.195≤a<1.205 (B)1.15≤a<1.18 (C)1.10≤a<1.30 (D)1.200≤a<1.205 (6)下列说法正确的是( ) (A)近似数3.80的精确度与近似数38的精确度相同; (B)近似数38.0与近似数38的有效数字个数一样 (C)3.1416精确到百分位后,有三个有效数字3,1,4; (D)把123*102记成1.23*104,其有效数字有四个.
(二)填空题:
(1)写出下列由四舍五入得到的近似值数的精确度与有效数字: (1)近似数85精确到________位,有效数字是________; (2)近似数3万精确到______位,有效数字是________; (3)近似数5200千精确到________,有效数字是_________; (4)近似数0.20精确到_________位,有效数字是_____________. (2)设e=2.71828......,取近似数2.7是精确到__________位,有_______个有效数字;
取近似数2.7183是精确到_________位,有_______个有效数字. (3)由四舍五入得到π=3.1416,精确到0.001的近似值是π=__________; (4)3.1416保留三个有效数字的近似值是_____________;
(三)判断题:
(1)近似数25.0精确以个痊,有效数字是2,5; (2)近似数4千和近似数4000的精确程度一样; (3)近似数4千和近似数4*10^3的精确程度一样; (4)9.949精确到0.01的近似数是9.95.
练习八(B级)
(一)用四舍五入法对下列各数取近似值(要求保留三个有效数字): (1)37.27 (2)810.9 (3)0.0045078 (4)3.079
(二)用四舍五入法对下列各数取近似值(要求精确到千位): (1)37890.6 (2)213612.4 (3)1906.57
9.
9x^2(x-1)^2-3(x^2-x)-56
=9x^2(x-1)^2-3x(x-1)-56
=[3x(x-1)-8][3x(x-1)+7]
=(3x^2-3x-8)(3x^2-3x+7
有的，经典例子如下:
(1)23+(-73)
(2)(-84)+(-49)
(3)7+(-2.04)
(4)4.23+(-7.57)
(5)(-7/3)+(-7/6)
(6)9/4+(-3/2)
(7)3.75+(2.25)+5/4
(8)-3.75+(+5/4)+(-1.5)
链接如下:
http://m.doc88.com/p-310765492384.html
(1) (-13)-(-13)+(-20)+(-2)
(2) 13+13-(-7)÷6
(3) (-32)-8-14-13
(4) (-67)×(-1)÷7+8
(5) (-11)×4-(-18)÷18
(6) 4+(-11)-1÷(-3)
(7) (-17)-6-16÷(-18)
(8) 5÷7+(-1)-(-8)
(9) (-1)×(-1)+15+1
(10) 3-(-5)×3÷(-15)
(11) 6×(-14)-(-14)+(-13)
(12) (-15)×(-13)-(-17)-(-4)
(13) (-20)÷13÷(-7)+11
(14) 8+(-1)÷7+(-4)
(15) (-13)-(-9)×16×(-12)
(16) (-1)+4×19+(-2)
(17) (-17)×(-9)-20+(-6)
(18) (-5)÷12-(-16)×(-15)
(19) (-3)-13×(-5)×13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13×(-16)
(22) (-14)+4-19-12
(23) 5×13÷14÷(-10)
(24) 3×1×17÷(-10)
(25) 6+(-12)+15-(-15)
(26) 15÷9÷13+(-7)
(27) 2÷(-10)×1-(-8)
(28) 11÷(-19)+(-14)-5
(29) 19-16+18÷(-11)
(30) (-1)÷19+(-5)+1
(31) (-5)+19÷10×(-5)
(32) 11÷(-17)×(-13)×12
(33) (-8)+(-10)÷8×17
(34) 7-(-12)÷(-1)+(-12)
(35) 12+12-19+20
(36) (-13)×(-11)×20+(-4)
(37) 17÷(-2)-2×(-19)
(38) 1-12×(-16)+(-9)
(39) 13×(-14)-15÷20
(40) (-15)×(-13)-6÷(-9)
(41) 15×(-1)÷12+7
(42) (-13)+(-16)+(-14)-(-6)
(43) 14×12×(-20)×(-13)
(44) 17-9-20+(-10)
(45) 12÷(-14)+(-14)+(-2)
(46) (-15)-12÷(-17)-(-3)
(47) 6-3÷9÷(-8)
(48) (-20)×(-15)×10×(-4)
(49) 7÷(-2)×(-3)÷(-14)
(50) 13÷2×18×(-7)
(51) 13×5+6+3
(52) (-15)÷5÷3+(-20)
(53) 19×4+17-4
(54) (-11)-(-6)×(-4)×(-9)
(55) (-16)+16-(-8)×(-13)
(56) 16÷(-1)÷(-10)÷(-20)
(57) (-1)-(-9)-9÷(-19)
(58) 13×20×(-13)×4
(59) 11×(-6)-3+18
(60) (-20)+(-12)+(-1)+(-12)
(61) (-19)-3×(-13)×4
(62) (-13)÷3-5×8
(63) (-15)÷1+17×(-18)
(64) (-13)÷3÷19÷8
(65) (-3)÷(-13)÷20×5
(66) 3÷12÷(-18)-18
(67) 5×(-19)÷13+(-6)
(68) 4+4×(-19)-11
(69) (-2)+17-5+(-1)
(70) 9+(-3)×19×(-19)
(71) (-12)-(-6)+17÷2
(72) 15×(-5)-(-3)÷5
(73) (-10)×2÷(-1)÷4
(74) (-8)×16÷(-6)+4
(75) 2-11+12+10
(76) (-3)+(-20)×(-7)×(-9)
(77) (-15)+8-17÷7
(78) (-14)×10+18×2
(79) (-7)+2-(-17)×19
(80) (-7)÷18÷1+1
(81) 11÷(-9)-(-16)÷17
(82) 15+5×6-(-8)
(83) (-13)×(-18)+18÷(-6)
(84) 11-(-1)÷11×(-6)
(85) (-4)+(-12)+19÷6
(86) (-18)÷(-1)÷(-19)+2
(87) 9×(-8)×(-6)÷11
(88) 20×(-3)×(-5)+1
(89) (-18)-2+(-11)÷20
(90) 15×1+4×17
(91) 1-10+(-14)÷(-1)
(92) 10+(-4)×(-19)+(-12)
(93) 15÷14÷5×7
(94) 8+(-13)÷3+1
(95) (-14)+6+(-2)×(-14)
(96) (-5)÷(-13)÷4+7
(97) (-15)÷(-2)÷(-12)+(-2)
(98) (-17)-(-20)-20×(-10)
(99) (-7)-10-13÷3
(100) (-20)+(-18)+11+9
29+[-23]+0+[-16]
[-38]+29+[-52]+60
[-13]+[-2]+[-1]+0+1+2
[-201]+125+301+[-75]
[-10]+[-1÷2]+3÷4+[-1÷4]
[-7÷2]+5÷6+[-0.5]+4÷5+19÷6
[-26.54]+[-6.14]+18.54+6.14
1.125+[-17÷5]+[-1÷8]+[-0.6]
(一2)十(一3)
给我出十道有理数三位数加法题
绛旓細[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)5+21*8/2-6-59 68/21-8-11*8+61 -2/9-7/9-56 4.6-(-3/4+1.6-4-3/4)1/2+3+5/6-7/12 [2/3-4-1/4*(-0.4)]/1/3+2 22+(-4)+(-2)+4*3 -2*8-8*1/2+8/1/8 (2/3+1/2)/(-1/12)*(-12...
绛旓細1.125*3+125*5+25*3+25 2.9999*3+101*11*(101-92)3.(23/4-3/4)*(3*6+2)4. 3/7 脳 49/9 - 4/3 5. 8/9 脳 15/36 + 1/27 6. 12脳 5/6 鈥 2/9 脳3 7. 8脳 5/4 + 1/4 8. 6梅 3/8 鈥 3/8 梅6 9. 4/7 脳 5/9 + 3/7 脳 5/9 10. 5/2...
绛旓細(1)(-8)+10+2+(-1)=-8+10+2-1=3(2)25+(-12)+(-17)-(-6)=25-12-17+6=2(3)(-0.8)+1.2+(-0.7)+(-2.1)=-0.8+1.2-0.7-2.1=-1.7(4)5.6+(-0.9)+4.4=(-8.1)=10+(-9)=1(5)5+(-6)+3+9+(-4)+(-7)=17+(-17)=0(6)0+(-3.17)+(-...
绛旓細(2)鑻ュ洓涓鏈夌悊鏁a,b,c,d涔嬬Н鏄鏁,鍒檃,b,c,d涓礋鏁扮殑涓暟鍙兘鏄痏__; (3)璁＄畻(-2/199)*(-7/6-3/2+8/3)=___; (4)璁＄畻:(4a)*(-3b)*(5c)*1/6=___; (5)璁＄畻:(-8)*(1/2-1/4+2)=-4-2+16=10鐨勯敊璇槸___; (6)璁＄畻:(-1/6)*(-6)*(10/7)*(-7/10)=[(-1/6...
绛旓細鏈夌悊鏁鐨勬贩鍚杩愮畻100閬涓冨勾绾锛岀浉鍏冲唴瀹瑰涓嬶細璁＄畻 15 - (-23) + (-12)璁＄畻 (-2) + (-4) + 3 璁＄畻 (-10) + 5 - (-15)璁＄畻 (-2.5) + 3.5 + (-6)璁＄畻 13 + (-24) + 27 璁＄畻 (-8) + 12 + (-6)璁＄畻 (-3) + 7 - (-5)璁＄畻 (-4) + 9 + (-7)璁＄畻 0 ...
绛旓細(涓)璁＄畻棰:(1)23+(-73)(2)(-84)+(-49)(3)7+(-2.04)(4)4.23+(-7.57)(5)(-7/3)+(-7/6)(6)9/4+(-3/2)(7)3.75+(2.25)+5/4 (8)-3.75+(+5/4)+(-1.5)(9)(-17/4)+(-10/3)+(+13/3)+(11/3)(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1...
绛旓細3.(-2x-y)^2-(-x-y)(x-y)-2(x-y)(x+2y)4.(2m^4n^3+16m^3n-2m^2n)/(-2m^2n)5. -9.9*10.1 6. 5^10*3^2*2^9 7. 123^2-124^3*122 8.39+[-23]+0+[-16]= 0 9.[-18]+29+[-52]+60= 19 10.[-3]+[-2]+[-1]+0+1+2= -3 11.[-301]+125+301...
绛旓細鏈夌悊鏁鐨勫姞鍑忔贩鍚堣繍绠 1锛璁＄畻棰 锛1锛3锛28-4锛76+1 - 锛涳紙2锛2锛75-2 -3 +1 锛涳紙3锛42梅锛-1 锛-1 梅锛-0.125锛;锛4锛(-48) 梅82-(-25) 梅(-6)2;锛5锛- +( )脳(-2.4).2.璁＄畻棰橈細锛10鈥裁5=50鈥诧級锛1锛-23梅1 脳锛-1 锛2梅锛1 锛2锛涳紙2锛-14-锛2-...
绛旓細鏈夌悊鏁鐨勫姞鍑忔贩鍚杩愮畻 銆愩愬悓姝ヨ揪绾缁冧範銆 1.閫夋嫨棰: (1)鎶-2-(+3)-(-5)+(-4)+(+3)鍐欐垚鐪佺暐鎷彿鍜岀殑褰㈠紡,姝ｇ‘鐨勬槸( ) A.-2-3-5-4+3 B.-2+3+5-4+3 C.-2-3+5-4+3 D.-2-3-5+4+3 (2)璁＄畻(-5)-(+3)+(-9)-(-7)+ 鎵寰楃粨鏋滄纭殑鏄( ) A.-10 B.-9 C.8 D.-...
绛旓細23.10x=100 24.11x=121 25.12x=144 26.13x=169 27.14x=196 28.15x=225 29.16x=256 30.17x=289 31.18x=324 32.19x=361 33.20x=400 31.21x=441 32.22x=484 33.111x=12321 34.1111x=1234321 35.11111x=123454321 36.111111x=12345654321 37.46/x=23 38.64/x=8 39.99/x=...
