问题
解答题
计算: (1)(-48)÷(-2)3-(-25)×(-4)+(-2)2 (2)[1
|
答案
(1)(-48)÷(-2)3-(-25)×(-4)+(-2)2
=48÷8-100+4
=6-100+4
=-90;
(2)[1
-(2 3
-1 3
+1 6
)×2.4]÷55 12
=[1
-2 3
×2.4+1 3
×2.4-1 6
×2.4]÷55 12
=[1
-0.8+0.4-1]÷52 3
=
÷54 15
=
.4 75