题目内容
计算
(1)8+(-
)-5-(-0.25)
(2)[(
)3×(-2)3]-(-
+
)÷(-2).
(1)8+(-
| 1 |
| 4 |
(2)[(
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
(1)原式=8-
-5+0.25
=(8-5)+(-
+0.25)
=3;
(2)原式=[
×(-8)]-(-
)×(-
)
=-1-
=-1
.
| 1 |
| 4 |
=(8-5)+(-
| 1 |
| 4 |
=3;
(2)原式=[
| 1 |
| 8 |
| 1 |
| 6 |
| 1 |
| 2 |
=-1-
| 1 |
| 12 |
=-1
| 1 |
| 12 |
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