题目内容
计算
(1)-1.25+(-
)-(-5).
(2)(
-
+1
)×(-12).
(1)-1.25+(-
| 3 |
| 4 |
(2)(
| 3 |
| 4 |
| 5 |
| 6 |
| 1 |
| 3 |
(1)-1.25+(-
)-(-5)
=-2+5
=3.
(2)(
-
+1
)×(-12)
=-9+10-16
=-15.
| 3 |
| 4 |
=-2+5
=3.
(2)(
| 3 |
| 4 |
| 5 |
| 6 |
| 1 |
| 3 |
=-9+10-16
=-15.
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