小学五年级下册分数乘法简便计算 五年级下册分数乘法与有什么区别
\u4e94\u5e74\u7ea7\u4e0b\u518c\u5206\u6570\u4e58\u6cd5\u8ba1\u7b97\u9898100\u9053\uff0c\u5feb\u5982\u4e0b\u56fe\uff1a
\u5206\u6570\u4e58\u6cd5\u662f\u4e00\u79cd\u6570\u5b66\u8fd0\u7b97\u65b9\u6cd5\u3002\u5206\u6570\u7684\u5206\u5b50\u4e0e\u5206\u5b50\u76f8\u4e58\uff0c\u5206\u6bcd\u4e0e\u5206\u6bcd\u76f8\u4e58\uff0c\u80fd\u7ea6\u5206\u7684\u8981\u5148\u7ea6\u5206\uff0c\u5206\u5b50\u4e0d\u80fd\u548c\u5206\u6bcd\u4e58\u3002 \u505a\u7b2c\u4e00\u6b65\u65f6\uff0c\u5c31\u8981\u60f3\u4e00\u4e2a\u6570\u7684\u5206\u5b50\u548c\u53e6\u4e00\u4e2a\u6570\u7684\u5206\u6bcd\u80fd\u4e0d\u80fd\u7ea6\u5206\u3002\uff080\u9664\u5916\uff09
\u5206\u6570\u4e0e\u6574\u6570\u76f8\u4e58\u5c31\u662f\u628a\u591a\u4e2a\u540c\u6837\u7684\u6570\u53e0\u52a0\uff0c\u5982⅔X2\uff0c\u5c31\u662f\u63072\u4e2a⅔\u76f8\u52a0\uff0c⅔X10\u662f\u630710\u4e2a⅔\u76f8\u52a0\u3002\u82e5\u662f\u6574\u6570\u4e58\u5206\u6570\u7684\u8bdd\uff1a\u6574\u6570\u5c31\u4e58\u4ee5\u5206\u5b50\uff0c\u4e0d\u80fd\u548c\u5206\u6bcd\u4e58\uff08\u6574\u6570\u548c\u5206\u6bcd\u53ef\u4ee5\u7ea6\u5206\u5c31\u7ea6\u5206\uff09\uff0c\u5728\u8fd9\u91cc\uff0c\u4e00\u4e2a\u6570\u4e58\u51e0\u5206\u4e4b\u51e0\u8868\u793a\u7684\u662f\u6c42\u8fd9\u4e2a\u6570\u7684\u51e0\u5206\u4e4b\u51e0\u662f\u591a\u5c11\u3002
\u5206\u6570\u4e58\u6cd5
\u3000\u3000\u3010\u77e5\u8bc6\u8981\u70b9\u3011
\u3000\u3000\u5206\u6570\u4e58\u6cd5\uff08\u4e00\uff09
\u3000\u3000\u77e5\u8bc6\u70b9\uff1a
\u3000\u30001\u3001\u7406\u89e3\u5206\u6570\u4e58\u6574\u6570\u7684\u610f\u4e49\u3002\u5206\u6570\u4e58\u6574\u6570\u7684\u610f\u4e49\u540c\u6574\u6570\u4e58\u6cd5\u7684\u610f\u4e49\u76f8\u540c\uff0c\u5c31\u662f\u6c42\u51e0\u4e2a\u76f8\u540c\u52a0\u6570\u7684\u548c\u7684\u7b80\u4fbf\u8fd0\u7b97\u3002
\u3000\u30002\u3001\u5206\u6570\u4e58\u6574\u6570\u7684\u8ba1\u7b97\u65b9\u6cd5\u3002\u5206\u6bcd\u4e0d\u53d8\uff0c\u5206\u5b50\u548c\u6574\u6570\u76f8\u4e58\u7684\u79ef\u4f5c\u5206\u5b50\u3002\u80fd\u7ea6\u5206\u7684\u8981\u7ea6\u6210\u6700\u7b80\u5206\u6570\u3002
\u3000\u30003\u3001\u8ba1\u7b97\u65f6\uff0c\u53ef\u4ee5\u5148\u7ea6\u5206\u5728\u8ba1\u7b97\u3002
\u3000\u3000\u5206\u6570\u4e58\u6cd5\uff08\u4e8c\uff09
\u3000\u3000\u77e5\u8bc6\u70b9\uff1a
\u3000\u3000
\u3000\u30001\u3001\u7ed3\u5408\u5177\u4f53\u60c5\u5883\uff0c\u8fdb\u4e00\u6b65\u63a2\u7d22\u5e76\u7406\u89e3\u5206\u6570\u4e58\u6574\u6570\u7684\u610f\u4e49\uff0c\u5e76\u80fd\u6b63\u786e\u8fdb\u884c\u8ba1\u7b97\u3002
\u3000\u30002\u3001\u80fd\u591f\u6c42\u4e00\u4e2a\u6570\u7684\u51e0\u5206\u4e4b\u51e0\u662f\u591a\u5c11\u3002
\u3000\u30003\u3001\u7406\u89e3\u6253\u6298\u7684\u542b\u4e49\u3002\u4f8b\u5982\uff1a\u4e5d\u6298\uff0c\u662f\u6307\u73b0\u4ef7\u662f\u539f\u4ef7\u7684\u5341\u5206\u4e4b\u4e5d\u3002
\u3000\u3000\u5206\u6570\u4e58\u6cd5\uff08\u4e09\uff09
\u3000\u3000\u77e5\u8bc6\u70b9\uff1a
\u3000\u30001\u3001\u5206\u6570\u4e58\u5206\u6570\u7684\u8ba1\u7b97\u65b9\u6cd5\uff0c\u5e76\u80fd\u6b63\u786e\u8fdb\u884c\u8ba1\u7b97\u3002
\u3000\u3000\u5206\u5b50\u76f8\u4e58\u505a\u5206\u5b50\uff0c\u5206\u6bcd\u76f8\u4e58\u505a\u5206\u6bcd\uff0c\u80fd\u7ea6\u5206\u7684\u53ef\u4ee5\u5148\u7ea6\u5206\u3002\u8ba1\u7b97\u7ed3\u679c\u8981\u6c42\u662f\u6700\u7b80\u5206\u6570\u3002
\u3000\u30002\u3001\u6bd4\u8f83\u5206\u6570\u76f8\u4e58\u7684\u79ef\u4e0e\u6bcf\u4e00\u4e2a\u4e58\u6570\u7684\u5927\u5c0f\u3002
\u3000\u3000\u771f\u5206\u6570\u76f8\u4e58\u79ef\u5c0f\u4e8e\u4efb\u4f55\u4e00\u4e2a\u4e58\u6570\uff1b\u771f\u5206\u6570\u4e0e\u5047\u5206\u6570\u76f8\u4e58\u79ef\u5927\u4e8e\u771f\u5206\u6570\u5c0f\u4e8e\u5047\u5206\u6570\u3002
\u3000\u3000
3
\u00d7
5
1
=
5
1
5
1
5
1
=
5
3
3
\u00d7
5
1
=
5
1
5
1
5
1
=
5
1
1
1
=
5
1
3
=
5
3
\u5206\u6570\u4e58\u4ee5\u6574\u6570\u7684\u8ba1\u7b97\u65b9\u6cd5\uff1a\u6574\u6570\u4e58\u4ee5\u5206\u6570\uff0c\u53ea\u628a\u6574\u6570\u4e58\u4ee5\u5206\u5b50\uff0c\u5206\u6bcd
\u4e0d\u53d8\u3002
\uff09
\u6559\u5b66\u53cd\u601d\uff1a
\u8fd9\u8282\u8bfe\u662f\u8ba9\u5b66\u751f\u7406\u89e3\u5206\u6570\u4e58\u6574\u6570\u7684\u610f\u4e49\uff0c
\u00b7\u638c\u63e1\u5206\u6570\u7684\u8ba1\u7b97\u6cd5\u5219\u3002
\u5728\u5e2e\u52a9\u5b66\u751f\u7406\u89e3\u5206\u6570\u4e58\u6574\u6570\u7684\u610f\u4e49\u65f6\uff0c\u5148\u5728\u5f15\u5165\u65f6\u590d\u4e60\u6574\u6570\u4e58\u6cd5\uff0c\u590d\u4e60\u6574\u6570\u4e58\u6cd5\u7684
\u610f\u4e49\uff0c\u5229\u7528\u77e5\u8bc6\u4e4b\u95f4\u7684\u8054\u7cfb\uff0c\u5de7\u5999\u5730\u8fd0\u7528\u8ba4\u77e5\u7684\u8fc1\u79fb\u89c4\u5f8b\u3002\u4f9d\u636e\u77e5\u8bc6\u7684\u8fc1\u79fb\uff0c\u4f7f\u5b66\u751f\u987a
\u5229\u638c\u63e1\u201c\u5206\u6570\u4e58\u4ee5\u6574\u6570\u7684\u610f\u4e49\u4e0e\u6574\u6570\u4e58\u6cd5\u610f\u4e49\u76f8\u540c\u201d
\u6559\u5b66\u5206\u6570\u4e58\u6cd5\u5728\u8fc7\u7a0b\u4e2d\u7ea6\u5206\u65f6\uff0c\u5982\uff1a
6
\u00d7
5/9
\uff0c\u5e76\u4e14\u5217\u51fa\u4e24\u79cd\u505a\u6cd5\u8ba9\u5b66\u751f\u8fdb\u884c\u5316\u8f83\u3002\u5c06
\u9898\u76ee\u6539\u5f97\u7a0d\u590d\u6742\u4e9b\uff0c\u8ba9\u5b66\u751f\u6bd4\u8d5b\u8c01\u505a\u5f97\u5feb\u3002\u5982\u679c\u54ea\u4f4d\u5b66\u751f\u662f\u7528\u6574\u6570\u76f4\u63a5\u4e58\u4ee5\u5206\u5b50\u7684\uff0c\u901f\u5ea6\u5f53\u7136\u4f1a\u5f88
\u6162\uff0c\u5f53\u505a\u5f97\u6700\u5feb\u540c\u5b66\u5c55\u793a\u81ea\u5df1\u7684\u505a\u6cd5\u65f6\uff0c\u5176\u4ed6\u540c\u5b66\u604d\u7136\u5927\u609f\uff0c\u6df1\u523b\u4f53\u4f1a\u4e86\u8ba1\u7b97\u8fc7\u7a0b\u4e2d\u5148\u7ea6\u5206\uff0c\u53ef\u4ee5
\u5316\u7e41\u4e3a\u7b80\u3002\u8fd9\u6837\uff0c\u5b66\u751f\u5728\u505a\u5206\u6570\u4e58\u6cd5\u65f6\uff0c\u5c31\u80fd\u8bb0\u4f4f\u201c\u80fd\u7ea6\u5206\u7684\u8981\u5148\u7ea6\u5206\u201d\u8fd9\u4e00\u8981\u70b9\u3002
\u7b2c\u4e8c\u8bfe\u65f6
\u5206\u6570\u4e58\u6cd5\uff08\u4e00\uff09
\u6559\u5b66\u65f6\u95f4\uff1a
2
\u6708
27
\u65e5
\u6559\u5b66\u76ee\u6807\uff1a
\u80fd\u529b\u76ee\u6807\uff1a
\u80fd\u6839\u636e\u89e3\u51b3\u95ee\u9898\u7684\u9700\u8981\uff0c\u63a2\u7a76\u6709\u5173\u7684\u6570\u5b66\u4fe1\u606f\uff0c\u53d1\u5c55\u521d\u6b65\u7684\u5206\u6570\u4e58\u6cd5\u7684\u80fd\u529b\u3002
\u77e5\u8bc6\u76ee\u6807\uff1a\u5b66\u4e60\u6574\u6570\u4e58\u4ee5\u5206\u6570\u7684\u8ba1\u7b97\u65b9\u6cd5\uff0c\u8ba9\u5b66\u751f\u4eb2\u81ea\u7ecf\u5386\u63a2\u7a76\u6574\u6570\u4e58\u4ee5\u5206\u6570\u7684\u8ba1
\u7b97\u539f\u7406\uff0c\u5b66\u751f\u80fd\u591f\u719f\u7ec3\u51c6\u786e\u7684\u8ba1\u7b97\u6574\u6570\u4e58\u4ee5\u5206\u6570\u3002
\u60c5\u611f\u76ee\u6807\uff1a\u4f7f\u5b66\u751f\u611f\u53d7\u5230\u5206\u6570\u4e58\u6cd5\u4e0e\u751f\u6d3b\u7684\u5bc6\u5207\u8054\u7cfb\uff0c\u57f9\u517b\u5b66\u4e60\u6570\u5b66\u7684\u826f\u597d\u5174\u8da3\u3002
\u6559\u5b66\u91cd\u70b9\u3001\u96be\u70b9\uff1a
\u5b66\u751f\u80fd\u591f\u719f\u7ec3\u7684\u8ba1\u7b97\u6574\u6570\u4e58\u4ee5\u5206\u6570
\u6559\u5b66\u65b9\u6cd5\uff1a
\u60c5\u5883\u3001
\u63a2\u7a76\u5c0f\u7ec4\u5408\u4f5c\u3002
\u6559\u5b66\u51c6\u5907\uff1a
\u5361\u7247\u3001\u8bfe\u4ef6
\u6559\u5b66\u8fc7\u7a0b\uff1a
\u4e00\u3001\u590d\u4e60\u5bfc\u5165\uff1a
\u6559\u5e08\u51fa\u793a\u6559\u5b66\u677f\u4e66\uff0c\u8bf7\u5b66\u751f\u8ba1\u7b97\u4e0b\u5217\u5206\u6570\u52a0\u51cf\u8fd0\u7b97\u9898\u3002
4
\u00d7
\u6559\u5e08\uff1a\u6765\u56de\u5de1\u89c6\u5b66\u751f\u7684\u505a\u9898\u60c5\u51b5\uff0c\u5e76\u63d0\u95ee\u5b66\u751f\u8bf4\u8bf4\u81ea\u5df1\u5982\u4f55\u8ba1\u7b97\u7684\uff1f
\u5b66\u751f\u5bfb\u627e\u5b8c\u6bd5\uff0c\u7eb7\u7eb7\u4e3e\u624b\u51c6\u5907\u56de\u7b54\u95ee\u9898\u3002
\u6559\u5e08\u63d0\u95ee\u5b66\u751f\u56de\u7b54\u95ee\u9898\u3002
\uff08\u5148\u901a\u5206\uff0c\u518d\u8fdb\u884c\u5206\u5b50\u4e0e\u5206\u5b50\u76f8\u52a0\u51cf\uff1b\u5206\u6bcd\u4e0d\u53d8\u3002
\uff09\u5e76\u6ce8\u610f
(1/3+1/4-1/6)*24
=1/3*24+1/4*24-1/6*24
=8+6-4
=14-4
=10
125*25*32
=(125*8)*(25*4)
=1000*100
=100000
绛旓細3/5 脳 9/9 + 3/5 ( 4/7 + 8/9 )脳2/25 15/21 脳3/4 + 10/21 脳3/4 - 3/4 3/45 脳2/5 3/6脳34/35 ( 5/6 - 5/9 )脳18/5 O(鈭鈭)O~浣犳槸灏忓鐢鍚楋紵鐪熸槸濂藉鐨勫ソ鍚屽鍛~~~鍔犳补鍟
绛旓細1銆鍒嗘暟涔鏁存暟锛屽垎姣嶄笉鍙橈紝鍒嗗瓙涔樻暣鏁帮紝鏈鍚庤兘绾﹀垎鐨勮绾﹀垎銆備緥锛2锛庡垎鏁颁箻鍒嗘暟锛岀敤鍒嗗瓙涔樺垎瀛愶紝鐢ㄥ垎姣嶄箻鍒嗘瘝锛屾渶鍚庤兘绾﹀垎鐨勮绾﹀垎銆備緥锛3锛庡垎鏁伴櫎浠ユ暣鏁帮紝鍒嗘瘝涓嶅彉锛屽鏋滃垎瀛愭槸鏁存暟鐨勫嶆暟锛屽垯鐢ㄥ垎瀛愰櫎浠ユ暣鏁帮紝鏈鍚庤兘绾﹀垎鐨勮绾﹀垎銆備緥锛4锛庡垎鏁伴櫎浠ユ暣鏁帮紝鍒嗘瘝涓嶅彉锛屽鏋滃垎瀛愪笉鏄暣鏁扮殑鍊嶆暟锛屽垯鐢ㄨ繖涓...
绛旓細鍒嗘暟鐨涔樻硶鐨璁＄畻鍙互鐢ㄥ埌涔樻硶鐨勫垎閰嶅緥銆佷氦鎹㈠緥绛夊叕寮忥紝渚嬪锛5脳锛2/3)+4*(2/3)=(5+4)*(2/3)=9*(2/3)=6.
绛旓細1. 3/7 脳 49/9 - 4/3 2. 8/9 脳 15/36 + 1/27 3. 12脳 5/6 鈥 2/9 脳3 4. 8脳 5/4 + 1/4 5. 6梅 3/8 鈥 3/8 梅6 6. 4/7 脳 5/9 + 3/7 脳 5/9 7. 5/2 -锛 3/2 + 4/5 锛8. 7/8 + 锛 1/8 + 1/9 锛9. 9 脳 5/6 + 5/6 10....
绛旓細鍒嗘暟涔樻硶鐨绠渚胯繍绠渚嬪瓙1/5脳8脳5 瑙ｉ鎬濊矾:鍥涘垯杩愮畻瑙勫垯(鎸夐『搴忚绠,鍏堢畻涔橀櫎鍚庣畻鍔犲噺,鏈夋嫭鍙峰厛绠楁嫭鍙,鏈変箻鏂瑰厛绠椾箻鏂)鍗宠劚寮忚繍绠(閫掔瓑寮忚绠)闇鍦ㄨ鍘熷垯鍓嶆彁涓嬭繘琛 瑙ｉ杩囩▼:1/5脳8脳5 =1/5脳5脳8 =1脳8 =8 瀛樼枒璇疯拷闂,婊℃剰璇烽噰绾 ...
绛旓細1.3/7 脳 49/9 - 4/3 2.8/9 脳 15/36 + 1/27 3.12脳 5/6 鈥 2/9 脳3 4.8脳 5/4 + 1/4 5.6梅 3/8 鈥 3/8 梅6 6.4/7 脳 5/9 + 3/7 脳 5/9 7.5/2 -锛 3/2 + 4/5 锛8.7/8 + 锛 1/8 + 1/9 锛9.9 脳 5/6 + 5/6 10.3/4 脳 8/9...
绛旓細瑙ｏ細7/18-4/5脳7/18 =1x7/18-4/5脳7/18 =(1-4/5)脳7/18 =1/5脳7/18 =7/90 3/7脳10-3/7脳3 =3/7脳(10-3)=3/7脳7 =3
绛旓細鍘熷紡鍖栫畝涓 10/9脳4/11脳11/2脳9/5=4 杩欓亾棰樼洰鐨绠渚鏂规硶灏辨槸鎶婂垎姣嶇炕涓婃潵鍜屽垎瀛愮浉绾﹀氨鍙互浜 鍒嗘瘝鎹㈠埌鍒嗗瓙鐨勬柟娉曪細鍒嗗瓙锛屽垎姣嶅璋冨氨琛屼簡銆
绛旓細5/1脳11 8/33脳43 94/108脳100 5/2脳6 3/6脳81
绛旓細20鍙1/8脳1/19 =(19+9/8)脳1/19 =19脳1/19+9/8脳1/19 =1+9/152 =1鍙9/152
