题目内容
计算:
(1)2-2÷
×3
(2)3
-(-2
)+(-
)-
-(+
)
(3)3+50÷22×(-
)-1
(4)-22-(1-
×0.2)÷(-2)3.
(1)2-2÷
| 1 |
| 3 |
(2)3
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 6 |
(3)3+50÷22×(-
| 1 |
| 5 |
(4)-22-(1-
| 1 |
| 5 |
(1)原式=2-2×3×3=2-18=-16;
(2)原式=3
+2
-
-
-
=(3
-
-
)+(2
-
)=3+2=5;
(3)原式=3+50×
×(-
)-1=3-
-1=-0.5;
(4)原式=-4-(1-
)÷(-8)=-4-
×(-
)=-4+
=-3
.
(2)原式=3
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 4 |
(3)原式=3+50×
| 1 |
| 4 |
| 1 |
| 5 |
| 5 |
| 2 |
(4)原式=-4-(1-
| 1 |
| 25 |
| 24 |
| 25 |
| 1 |
| 8 |
| 3 |
| 25 |
| 22 |
| 25 |
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