题目内容
计算:
(1)-5+6-7+8
(2)-42×
-(-5)×0.25×(-4)3
(3)(-3)×(-4)÷(-6)
(4)-
×(-3)2
(5)-1.53×0.75-0.53×(-
)
(6)-
-(1-0.5)÷
×[2+(-4)2].
(1)-5+6-7+8
(2)-42×
| 5 |
| 8 |
(3)(-3)×(-4)÷(-6)
(4)-
| 1 |
| 3 |
(5)-1.53×0.75-0.53×(-
| 3 |
| 4 |
(6)-
| 3 |
| 4 |
| 1 |
| 3 |
(1)原式=[(-5)+(-7)]+(6+8)=-12+14=2;
(2)原式=-16×
-(-5)×
×(-64)=-10-(-80)=-10+80=70;
(3)原式=12÷(-6)=-2;
(4)原式=-
×9=-3;
(5)原式=-1.53×0.75+0.53×0.75=0.75×(-1.53+0.53)=0.75;
(6)原式=-
-0.5×3×18=-
-27=-27
.
(2)原式=-16×
| 5 |
| 8 |
| 1 |
| 4 |
(3)原式=12÷(-6)=-2;
(4)原式=-
| 1 |
| 3 |
(5)原式=-1.53×0.75+0.53×0.75=0.75×(-1.53+0.53)=0.75;
(6)原式=-
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
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