判断正误，并把错误的改正过来。 1．0.39×6.1=23.79 2．52.4×2.5=13.13．12.3×1.1=13.534．54.5×1 直接写得数对又快（近似值符号的只要求估算）．321+79=0...
\u6570\u5b57\u9898,\u8c01\u4f1a?\u53d4\u53d4\u963f\u59e8\u5e2e\u52a9\u4e00\u4e0b\u3002(\u5c0f\u707f\\u5f20\u6dd1\u95ee)\u5171\u6709648\u4e2a\u7b97\u5f0f\uff08\u6ca1\u6709\u6392\u9664\u53ef\u4ea4\u6362\u6570\u5b57\u4f4d\u7f6e\u7684\uff09\uff1a
10*2+1*0-2=18\uff0c10*3+1*0-3=27\uff0c10*4+1*0-4=36\uff0c10*5+1*0-5=45\uff0c10*6+1*0-6=54
10*7+1*0-7=63\uff0c10*8+1*0-8=72\uff0c10*9+1*0-9=81\uff0c12*0+1*2-0=2\uff0c12*3+1*2-3=35
12*4+1*2-4=46\uff0c12*5+1*2-5=57\uff0c12*6+1*2-6=68\uff0c12*7+1*2-7=79\uff0c12*8+1*2-8=90
12*9+1*2-9=101\uff0c13*0+1*3-0=3\uff0c13*2+1*3-2=27\uff0c13*4+1*3-4=51\uff0c13*5+1*3-5=63
13*6+1*3-6=75\uff0c13*7+1*3-7=87\uff0c13*8+1*3-8=99\uff0c13*9+1*3-9=111\uff0c14*0+1*4-0=4
14*2+1*4-2=30\uff0c14*3+1*4-3=43\uff0c14*5+1*4-5=69\uff0c14*6+1*4-6=82\uff0c14*7+1*4-7=95
14*8+1*4-8=108\uff0c14*9+1*4-9=121\uff0c15*0+1*5-0=5\uff0c15*2+1*5-2=33\uff0c15*3+1*5-3=47
15*4+1*5-4=61\uff0c15*6+1*5-6=89\uff0c15*7+1*5-7=103\uff0c15*8+1*5-8=117\uff0c15*9+1*5-9=131
16*0+1*6-0=6\uff0c16*2+1*6-2=36\uff0c16*3+1*6-3=51\uff0c16*4+1*6-4=66\uff0c16*5+1*6-5=81
16*7+1*6-7=111\uff0c16*8+1*6-8=126\uff0c16*9+1*6-9=141\uff0c17*0+1*7-0=7\uff0c17*2+1*7-2=39
17*3+1*7-3=55\uff0c17*4+1*7-4=71\uff0c17*5+1*7-5=87\uff0c17*6+1*7-6=103\uff0c17*8+1*7-8=135
17*9+1*7-9=151\uff0c18*0+1*8-0=8\uff0c18*2+1*8-2=42\uff0c18*3+1*8-3=59\uff0c18*4+1*8-4=76
18*5+1*8-5=93\uff0c18*6+1*8-6=110\uff0c18*7+1*8-7=127\uff0c18*9+1*8-9=161\uff0c19*0+1*9-0=9
19*2+1*9-2=45\uff0c19*3+1*9-3=63\uff0c19*4+1*9-4=81\uff0c19*5+1*9-5=99\uff0c19*6+1*9-6=117
19*7+1*9-7=135\uff0c19*8+1*9-8=153\uff0c20*1+2*0-1=19\uff0c20*3+2*0-3=57\uff0c20*4+2*0-4=76
20*5+2*0-5=95\uff0c20*6+2*0-6=114\uff0c20*7+2*0-7=133\uff0c20*8+2*0-8=152\uff0c20*9+2*0-9=171
21*0+2*1-0=2\uff0c21*3+2*1-3=62\uff0c21*4+2*1-4=82\uff0c21*5+2*1-5=102\uff0c21*6+2*1-6=122
21*7+2*1-7=142\uff0c21*8+2*1-8=162\uff0c21*9+2*1-9=182\uff0c23*0+2*3-0=6\uff0c23*1+2*3-1=28
23*4+2*3-4=94\uff0c23*5+2*3-5=116\uff0c23*6+2*3-6=138\uff0c23*7+2*3-7=160\uff0c23*8+2*3-8=182
23*9+2*3-9=204\uff0c24*0+2*4-0=8\uff0c24*1+2*4-1=31\uff0c24*3+2*4-3=77\uff0c24*5+2*4-5=123
24*6+2*4-6=146\uff0c24*7+2*4-7=169\uff0c24*8+2*4-8=192\uff0c24*9+2*4-9=215\uff0c25*0+2*5-0=10
25*1+2*5-1=34\uff0c25*3+2*5-3=82\uff0c25*4+2*5-4=106\uff0c25*6+2*5-6=154\uff0c25*7+2*5-7=178
25*8+2*5-8=202\uff0c25*9+2*5-9=226\uff0c26*0+2*6-0=12\uff0c26*1+2*6-1=37\uff0c26*3+2*6-3=87
26*4+2*6-4=112\uff0c26*5+2*6-5=137\uff0c26*7+2*6-7=187\uff0c26*8+2*6-8=212\uff0c26*9+2*6-9=237
27*0+2*7-0=14\uff0c27*1+2*7-1=40\uff0c27*3+2*7-3=92\uff0c27*4+2*7-4=118\uff0c27*5+2*7-5=144
27*6+2*7-6=170\uff0c27*8+2*7-8=222\uff0c27*9+2*7-9=248\uff0c28*0+2*8-0=16\uff0c28*1+2*8-1=43
28*3+2*8-3=97\uff0c28*4+2*8-4=124\uff0c28*5+2*8-5=151\uff0c28*6+2*8-6=178\uff0c28*7+2*8-7=205
28*9+2*8-9=259\uff0c29*0+2*9-0=18\uff0c29*1+2*9-1=46\uff0c29*3+2*9-3=102\uff0c29*4+2*9-4=130
29*5+2*9-5=158\uff0c29*6+2*9-6=186\uff0c29*7+2*9-7=214\uff0c29*8+2*9-8=242\uff0c30*1+3*0-1=29
30*2+3*0-2=58\uff0c30*4+3*0-4=116\uff0c30*5+3*0-5=145\uff0c30*6+3*0-6=174\uff0c30*7+3*0-7=203
30*8+3*0-8=232\uff0c30*9+3*0-9=261\uff0c31*0+3*1-0=3\uff0c31*2+3*1-2=63\uff0c31*4+3*1-4=123
31*5+3*1-5=153\uff0c31*6+3*1-6=183\uff0c31*7+3*1-7=213\uff0c31*8+3*1-8=243\uff0c31*9+3*1-9=273
32*0+3*2-0=6\uff0c32*1+3*2-1=37\uff0c32*4+3*2-4=130\uff0c32*5+3*2-5=161\uff0c32*6+3*2-6=192
32*7+3*2-7=223\uff0c32*8+3*2-8=254\uff0c32*9+3*2-9=285\uff0c34*0+3*4-0=12\uff0c34*1+3*4-1=45
34*2+3*4-2=78\uff0c34*5+3*4-5=177\uff0c34*6+3*4-6=210\uff0c34*7+3*4-7=243\uff0c34*8+3*4-8=276
34*9+3*4-9=309\uff0c35*0+3*5-0=15\uff0c35*1+3*5-1=49\uff0c35*2+3*5-2=83\uff0c35*4+3*5-4=151
35*6+3*5-6=219\uff0c35*7+3*5-7=253\uff0c35*8+3*5-8=287\uff0c35*9+3*5-9=321\uff0c36*0+3*6-0=18
36*1+3*6-1=53\uff0c36*2+3*6-2=88\uff0c36*4+3*6-4=158\uff0c36*5+3*6-5=193\uff0c36*7+3*6-7=263
36*8+3*6-8=298\uff0c36*9+3*6-9=333\uff0c37*0+3*7-0=21\uff0c37*1+3*7-1=57\uff0c37*2+3*7-2=93
37*4+3*7-4=165\uff0c37*5+3*7-5=201\uff0c37*6+3*7-6=237\uff0c37*8+3*7-8=309\uff0c37*9+3*7-9=345
38*0+3*8-0=24\uff0c38*1+3*8-1=61\uff0c38*2+3*8-2=98\uff0c38*4+3*8-4=172\uff0c38*5+3*8-5=209
38*6+3*8-6=246\uff0c38*7+3*8-7=283\uff0c38*9+3*8-9=357\uff0c39*0+3*9-0=27\uff0c39*1+3*9-1=65
39*2+3*9-2=103\uff0c39*4+3*9-4=179\uff0c39*5+3*9-5=217\uff0c39*6+3*9-6=255\uff0c39*7+3*9-7=293
39*8+3*9-8=331\uff0c40*1+4*0-1=39\uff0c40*2+4*0-2=78\uff0c40*3+4*0-3=117\uff0c40*5+4*0-5=195
40*6+4*0-6=234\uff0c40*7+4*0-7=273\uff0c40*8+4*0-8=312\uff0c40*9+4*0-9=351\uff0c41*0+4*1-0=4
41*2+4*1-2=84\uff0c41*3+4*1-3=124\uff0c41*5+4*1-5=204\uff0c41*6+4*1-6=244\uff0c41*7+4*1-7=284
41*8+4*1-8=324\uff0c41*9+4*1-9=364\uff0c42*0+4*2-0=8\uff0c42*1+4*2-1=49\uff0c42*3+4*2-3=131
42*5+4*2-5=213\uff0c42*6+4*2-6=254\uff0c42*7+4*2-7=295\uff0c42*8+4*2-8=336\uff0c42*9+4*2-9=377
43*0+4*3-0=12\uff0c43*1+4*3-1=54\uff0c43*2+4*3-2=96\uff0c43*5+4*3-5=222\uff0c43*6+4*3-6=264
43*7+4*3-7=306\uff0c43*8+4*3-8=348\uff0c43*9+4*3-9=390\uff0c45*0+4*5-0=20\uff0c45*1+4*5-1=64
45*2+4*5-2=108\uff0c45*3+4*5-3=152\uff0c45*6+4*5-6=284\uff0c45*7+4*5-7=328\uff0c45*8+4*5-8=372
45*9+4*5-9=416\uff0c46*0+4*6-0=24\uff0c46*1+4*6-1=69\uff0c46*2+4*6-2=114\uff0c46*3+4*6-3=159
46*5+4*6-5=249\uff0c46*7+4*6-7=339\uff0c46*8+4*6-8=384\uff0c46*9+4*6-9=429\uff0c47*0+4*7-0=28
47*1+4*7-1=74\uff0c47*2+4*7-2=120\uff0c47*3+4*7-3=166\uff0c47*5+4*7-5=258\uff0c47*6+4*7-6=304
47*8+4*7-8=396\uff0c47*9+4*7-9=442\uff0c48*0+4*8-0=32\uff0c48*1+4*8-1=79\uff0c48*2+4*8-2=126
48*3+4*8-3=173\uff0c48*5+4*8-5=267\uff0c48*6+4*8-6=314\uff0c48*7+4*8-7=361\uff0c48*9+4*8-9=455
49*0+4*9-0=36\uff0c49*1+4*9-1=84\uff0c49*2+4*9-2=132\uff0c49*3+4*9-3=180\uff0c49*5+4*9-5=276
49*6+4*9-6=324\uff0c49*7+4*9-7=372\uff0c49*8+4*9-8=420\uff0c50*1+5*0-1=49\uff0c50*2+5*0-2=98
50*3+5*0-3=147\uff0c50*4+5*0-4=196\uff0c50*6+5*0-6=294\uff0c50*7+5*0-7=343\uff0c50*8+5*0-8=392
50*9+5*0-9=441\uff0c51*0+5*1-0=5\uff0c51*2+5*1-2=105\uff0c51*3+5*1-3=155\uff0c51*4+5*1-4=205
51*6+5*1-6=305\uff0c51*7+5*1-7=355\uff0c51*8+5*1-8=405\uff0c51*9+5*1-9=455\uff0c52*0+5*2-0=10
52*1+5*2-1=61\uff0c52*3+5*2-3=163\uff0c52*4+5*2-4=214\uff0c52*6+5*2-6=316\uff0c52*7+5*2-7=367
52*8+5*2-8=418\uff0c52*9+5*2-9=469\uff0c53*0+5*3-0=15\uff0c53*1+5*3-1=67\uff0c53*2+5*3-2=119
53*4+5*3-4=223\uff0c53*6+5*3-6=327\uff0c53*7+5*3-7=379\uff0c53*8+5*3-8=431\uff0c53*9+5*3-9=483
54*0+5*4-0=20\uff0c54*1+5*4-1=73\uff0c54*2+5*4-2=126\uff0c54*3+5*4-3=179\uff0c54*6+5*4-6=338
54*7+5*4-7=391\uff0c54*8+5*4-8=444\uff0c54*9+5*4-9=497\uff0c56*0+5*6-0=30\uff0c56*1+5*6-1=85
56*2+5*6-2=140\uff0c56*3+5*6-3=195\uff0c56*4+5*6-4=250\uff0c56*7+5*6-7=415\uff0c56*8+5*6-8=470
56*9+5*6-9=525\uff0c57*0+5*7-0=35\uff0c57*1+5*7-1=91\uff0c57*2+5*7-2=147\uff0c57*3+5*7-3=203
57*4+5*7-4=259\uff0c57*6+5*7-6=371\uff0c57*8+5*7-8=483\uff0c57*9+5*7-9=539\uff0c58*0+5*8-0=40
58*1+5*8-1=97\uff0c58*2+5*8-2=154\uff0c58*3+5*8-3=211\uff0c58*4+5*8-4=268\uff0c58*6+5*8-6=382
58*7+5*8-7=439\uff0c58*9+5*8-9=553\uff0c59*0+5*9-0=45\uff0c59*1+5*9-1=103\uff0c59*2+5*9-2=161
59*3+5*9-3=219\uff0c59*4+5*9-4=277\uff0c59*6+5*9-6=393\uff0c59*7+5*9-7=451\uff0c59*8+5*9-8=509
60*1+6*0-1=59\uff0c60*2+6*0-2=118\uff0c60*3+6*0-3=177\uff0c60*4+6*0-4=236\uff0c60*5+6*0-5=295
60*7+6*0-7=413\uff0c60*8+6*0-8=472\uff0c60*9+6*0-9=531\uff0c61*0+6*1-0=6\uff0c61*2+6*1-2=126
61*3+6*1-3=186\uff0c61*4+6*1-4=246\uff0c61*5+6*1-5=306\uff0c61*7+6*1-7=426\uff0c61*8+6*1-8=486
61*9+6*1-9=546\uff0c62*0+6*2-0=12\uff0c62*1+6*2-1=73\uff0c62*3+6*2-3=195\uff0c62*4+6*2-4=256
62*5+6*2-5=317\uff0c62*7+6*2-7=439\uff0c62*8+6*2-8=500\uff0c62*9+6*2-9=561\uff0c63*0+6*3-0=18
63*1+6*3-1=80\uff0c63*2+6*3-2=142\uff0c63*4+6*3-4=266\uff0c63*5+6*3-5=328\uff0c63*7+6*3-7=452
63*8+6*3-8=514\uff0c63*9+6*3-9=576\uff0c64*0+6*4-0=24\uff0c64*1+6*4-1=87\uff0c64*2+6*4-2=150
64*3+6*4-3=213\uff0c64*5+6*4-5=339\uff0c64*7+6*4-7=465\uff0c64*8+6*4-8=528\uff0c64*9+6*4-9=591
65*0+6*5-0=30\uff0c65*1+6*5-1=94\uff0c65*2+6*5-2=158\uff0c65*3+6*5-3=222\uff0c65*4+6*5-4=286
65*7+6*5-7=478\uff0c65*8+6*5-8=542\uff0c65*9+6*5-9=606\uff0c67*0+6*7-0=42\uff0c67*1+6*7-1=108
67*2+6*7-2=174\uff0c67*3+6*7-3=240\uff0c67*4+6*7-4=306\uff0c67*5+6*7-5=372\uff0c67*8+6*7-8=570
67*9+6*7-9=636\uff0c68*0+6*8-0=48\uff0c68*1+6*8-1=115\uff0c68*2+6*8-2=182\uff0c68*3+6*8-3=249
68*4+6*8-4=316\uff0c68*5+6*8-5=383\uff0c68*7+6*8-7=517\uff0c68*9+6*8-9=651\uff0c69*0+6*9-0=54
69*1+6*9-1=122\uff0c69*2+6*9-2=190\uff0c69*3+6*9-3=258\uff0c69*4+6*9-4=326\uff0c69*5+6*9-5=394
69*7+6*9-7=530\uff0c69*8+6*9-8=598\uff0c70*1+7*0-1=69\uff0c70*2+7*0-2=138\uff0c70*3+7*0-3=207
70*4+7*0-4=276\uff0c70*5+7*0-5=345\uff0c70*6+7*0-6=414\uff0c70*8+7*0-8=552\uff0c70*9+7*0-9=621
71*0+7*1-0=7\uff0c71*2+7*1-2=147\uff0c71*3+7*1-3=217\uff0c71*4+7*1-4=287\uff0c71*5+7*1-5=357
71*6+7*1-6=427\uff0c71*8+7*1-8=567\uff0c71*9+7*1-9=637\uff0c72*0+7*2-0=14\uff0c72*1+7*2-1=85
72*3+7*2-3=227\uff0c72*4+7*2-4=298\uff0c72*5+7*2-5=369\uff0c72*6+7*2-6=440\uff0c72*8+7*2-8=582
72*9+7*2-9=653\uff0c73*0+7*3-0=21\uff0c73*1+7*3-1=93\uff0c73*2+7*3-2=165\uff0c73*4+7*3-4=309
73*5+7*3-5=381\uff0c73*6+7*3-6=453\uff0c73*8+7*3-8=597\uff0c73*9+7*3-9=669\uff0c74*0+7*4-0=28
74*1+7*4-1=101\uff0c74*2+7*4-2=174\uff0c74*3+7*4-3=247\uff0c74*5+7*4-5=393\uff0c74*6+7*4-6=466
74*8+7*4-8=612\uff0c74*9+7*4-9=685\uff0c75*0+7*5-0=35\uff0c75*1+7*5-1=109\uff0c75*2+7*5-2=183
75*3+7*5-3=257\uff0c75*4+7*5-4=331\uff0c75*6+7*5-6=479\uff0c75*8+7*5-8=627\uff0c75*9+7*5-9=701
76*0+7*6-0=42\uff0c76*1+7*6-1=117\uff0c76*2+7*6-2=192\uff0c76*3+7*6-3=267\uff0c76*4+7*6-4=342
76*5+7*6-5=417\uff0c76*8+7*6-8=642\uff0c76*9+7*6-9=717\uff0c78*0+7*8-0=56\uff0c78*1+7*8-1=133
78*2+7*8-2=210\uff0c78*3+7*8-3=287\uff0c78*4+7*8-4=364\uff0c78*5+7*8-5=441\uff0c78*6+7*8-6=518
78*9+7*8-9=749\uff0c79*0+7*9-0=63\uff0c79*1+7*9-1=141\uff0c79*2+7*9-2=219\uff0c79*3+7*9-3=297
79*4+7*9-4=375\uff0c79*5+7*9-5=453\uff0c79*6+7*9-6=531\uff0c79*8+7*9-8=687\uff0c80*1+8*0-1=79
80*2+8*0-2=158\uff0c80*3+8*0-3=237\uff0c80*4+8*0-4=316\uff0c80*5+8*0-5=395\uff0c80*6+8*0-6=474
80*7+8*0-7=553\uff0c80*9+8*0-9=711\uff0c81*0+8*1-0=8\uff0c81*2+8*1-2=168\uff0c81*3+8*1-3=248
81*4+8*1-4=328\uff0c81*5+8*1-5=408\uff0c81*6+8*1-6=488\uff0c81*7+8*1-7=568\uff0c81*9+8*1-9=728
82*0+8*2-0=16\uff0c82*1+8*2-1=97\uff0c82*3+8*2-3=259\uff0c82*4+8*2-4=340\uff0c82*5+8*2-5=421
82*6+8*2-6=502\uff0c82*7+8*2-7=583\uff0c82*9+8*2-9=745\uff0c83*0+8*3-0=24\uff0c83*1+8*3-1=106
83*2+8*3-2=188\uff0c83*4+8*3-4=352\uff0c83*5+8*3-5=434\uff0c83*6+8*3-6=516\uff0c83*7+8*3-7=598
83*9+8*3-9=762\uff0c84*0+8*4-0=32\uff0c84*1+8*4-1=115\uff0c84*2+8*4-2=198\uff0c84*3+8*4-3=281
84*5+8*4-5=447\uff0c84*6+8*4-6=530\uff0c84*7+8*4-7=613\uff0c84*9+8*4-9=779\uff0c85*0+8*5-0=40
85*1+8*5-1=124\uff0c85*2+8*5-2=208\uff0c85*3+8*5-3=292\uff0c85*4+8*5-4=376\uff0c85*6+8*5-6=544
85*7+8*5-7=628\uff0c85*9+8*5-9=796\uff0c86*0+8*6-0=48\uff0c86*1+8*6-1=133\uff0c86*2+8*6-2=218
86*3+8*6-3=303\uff0c86*4+8*6-4=388\uff0c86*5+8*6-5=473\uff0c86*7+8*6-7=643\uff0c86*9+8*6-9=813
87*0+8*7-0=56\uff0c87*1+8*7-1=142\uff0c87*2+8*7-2=228\uff0c87*3+8*7-3=314\uff0c87*4+8*7-4=400
87*5+8*7-5=486\uff0c87*6+8*7-6=572\uff0c87*9+8*7-9=830\uff0c89*0+8*9-0=72\uff0c89*1+8*9-1=160
89*2+8*9-2=248\uff0c89*3+8*9-3=336\uff0c89*4+8*9-4=424\uff0c89*5+8*9-5=512\uff0c89*6+8*9-6=600
89*7+8*9-7=688\uff0c90*1+9*0-1=89\uff0c90*2+9*0-2=178\uff0c90*3+9*0-3=267\uff0c90*4+9*0-4=356
90*5+9*0-5=445\uff0c90*6+9*0-6=534\uff0c90*7+9*0-7=623\uff0c90*8+9*0-8=712\uff0c91*0+9*1-0=9
91*2+9*1-2=189\uff0c91*3+9*1-3=279\uff0c91*4+9*1-4=369\uff0c91*5+9*1-5=459\uff0c91*6+9*1-6=549
91*7+9*1-7=639\uff0c91*8+9*1-8=729\uff0c92*0+9*2-0=18\uff0c92*1+9*2-1=109\uff0c92*3+9*2-3=291
92*4+9*2-4=382\uff0c92*5+9*2-5=473\uff0c92*6+9*2-6=564\uff0c92*7+9*2-7=655\uff0c92*8+9*2-8=746
93*0+9*3-0=27\uff0c93*1+9*3-1=119\uff0c93*2+9*3-2=211\uff0c93*4+9*3-4=395\uff0c93*5+9*3-5=487
93*6+9*3-6=579\uff0c93*7+9*3-7=671\uff0c93*8+9*3-8=763\uff0c94*0+9*4-0=36\uff0c94*1+9*4-1=129
94*2+9*4-2=222\uff0c94*3+9*4-3=315\uff0c94*5+9*4-5=501\uff0c94*6+9*4-6=594\uff0c94*7+9*4-7=687
94*8+9*4-8=780\uff0c95*0+9*5-0=45\uff0c95*1+9*5-1=139\uff0c95*2+9*5-2=233\uff0c95*3+9*5-3=327
95*4+9*5-4=421\uff0c95*6+9*5-6=609\uff0c95*7+9*5-7=703\uff0c95*8+9*5-8=797\uff0c96*0+9*6-0=54
96*1+9*6-1=149\uff0c96*2+9*6-2=244\uff0c96*3+9*6-3=339\uff0c96*4+9*6-4=434\uff0c96*5+9*6-5=529
96*7+9*6-7=719\uff0c96*8+9*6-8=814\uff0c97*0+9*7-0=63\uff0c97*1+9*7-1=159\uff0c97*2+9*7-2=255
97*3+9*7-3=351\uff0c97*4+9*7-4=447\uff0c97*5+9*7-5=543\uff0c97*6+9*7-6=639\uff0c97*8+9*7-8=831
98*0+9*8-0=72\uff0c98*1+9*8-1=169\uff0c98*2+9*8-2=266\uff0c98*3+9*8-3=363\uff0c98*4+9*8-4=460
98*5+9*8-5=557\uff0c98*6+9*8-6=654\uff0c98*7+9*8-7=751
321+79=4000.9-0.26=0.640.3\u00f70.4=3431\u00d7197\u224860002.5-2.5\u00f75=223\u00f732=490.13\u00d7100=0.15.2\u00f710%=520.25\u00d756\u00d74=567\u00d723\u00f77\u00d723=49
| 1．错误；改正：2.379 2．错误；改正：131 3．正确 4．正确 |
绛旓細1.姝ｇ‘ 2. have a good time锛堟坊鍔燼锛3.go home( 鍘绘帀to)4.by鏀逛负take 5.姝ｇ‘ 6.you鏀逛负your
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绛旓細鈶狅紙x+2锛夛紙x-3锛/锛2+x锛夛紙3-x锛=-1 姝ｇ‘ 鈶+a/y+a=x/y 閿欒 鍥犱负绾﹀垎蹇呴』鏁翠綋绾﹀幓 (x+a)/(y+a)宸茬粡鏄渶绠 鈶紙x+y锛-锛坸-y锛/2锛坸+y锛夛紙x-y锛=浜屽垎涔嬩竴 閿欒 鍒嗗瓙鍖栫畝涓2y 绾﹀垎蹇呴』鏁翠綋绾﹀幓 锛坸+y锛-锛坸-y锛/2锛坸+y锛夛紙x-y锛=2y/2锛坸+y锛夛紙x-y锛=y...
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