题目内容
计算
①(-
)-(+
)+|-
|-(-
)
②
÷(-2
)-
×(-1
)-0.5×2÷
.
①(-
| 2 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 4 |
②
| 8 |
| 5 |
| 2 |
| 5 |
| 8 |
| 21 |
| 3 |
| 4 |
| 1 |
| 2 |
①原式=-
-
+
+
=-1+1
=0;
②原式=
×(-
)-
×(-
)-
×2×2
=-
+
-2
=-2.
| 2 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 4 |
=-1+1
=0;
②原式=
| 8 |
| 5 |
| 5 |
| 12 |
| 8 |
| 21 |
| 7 |
| 4 |
| 1 |
| 2 |
=-
| 2 |
| 3 |
| 2 |
| 3 |
=-2.
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