1.去括号 1,-(2m-3) 2.n-3(4-2m) 3.16a-8(3b+4C) 4.t+3\2(12-9V) 5.-(5m+n)-7(a-3b)
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1.去括号 1,-(2m-3) 2.n-3(4-2m) 3.16a-8(3b+4C) 4.t+3\2(12-9V) 5.-(5m+n)-7(a-3b)
1.去括号 1,-(2m-3) 2.n-3(4-2m) 3.16a-8(3b+4C) 4.t+3\2(12-9V) 5.-(5m+n)-7(a-3b)
1.去括号 1,-(2m-3) 2.n-3(4-2m) 3.16a-8(3b+4C) 4.t+3\2(12-9V) 5.-(5m+n)-7(a-3b)
1.-(2m-3) =-2m+3
2.n-3(4-2m) =n-12+6m
3.16a-8(3b+4C)=16a-24b-32c
4.t+3\2(12-9V) =t+18-(27/2)V
5.-(5m+n)-7(a-3b)=-5m-n-7a+21b
1楼的错 第1题!
1.-(2m-3) =12m+3
2.n-3(4-2m) =n-12+6m
3.16a-8(3b+4C)=16a-24b-32c
4.t+3\2(12-9V) =t+18-27/2V
5.-(5m+n)-7(a-3b)=-5m-n-7a+21b
1.-(2m-3) =-2m+3
2.n-3(4-2m) =n-12+6m
3.16a-8(3b+4C)=16a-24b-32c
4.t+3\2(12-9V) =t+18-(27/2)V
5.-(5m+n)-7(a-3b)=-5m-n-7a+21b
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