问题
解答题
(1)化简:7ab+(-8ac)-(-5ab)+10ac-12ab (2)计算:0.25×(-2)3-[4÷(-
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答案
(1)原式=7ab-8ac+5ab+10ac-12ab
=(5+7-12)ab+(-8+10)ac
=2ac;
(2)原式=
×(-8)-[4×1 4
+1]+(-1)9 4
=-2-[9+1]-1 =-2-10-1 =-13
(1)化简:7ab+(-8ac)-(-5ab)+10ac-12ab (2)计算:0.25×(-2)3-[4÷(-
|
(1)原式=7ab-8ac+5ab+10ac-12ab
=(5+7-12)ab+(-8+10)ac
=2ac;
(2)原式=
×(-8)-[4×1 4
+1]+(-1)9 4
=-2-[9+1]-1 =-2-10-1 =-13