题目内容
计算
(1)(
+
-
)÷(-
) (2)-42÷(-2)2+12÷(-
)×3
(1)(
| 7 |
| 9 |
| 5 |
| 6 |
| 11 |
| 12 |
| 1 |
| 36 |
| 1 |
| 3 |
(1)原式=(
+
-
)×(-36)
=
×(-36)+
×(-36)-
×(-36)
=-28-30+33
=-25;
(2)原式=-16÷4+12×(-3)×3
=-4-108
=-112.
| 7 |
| 9 |
| 5 |
| 6 |
| 11 |
| 12 |
=
| 7 |
| 9 |
| 5 |
| 6 |
| 11 |
| 12 |
=-28-30+33
=-25;
(2)原式=-16÷4+12×(-3)×3
=-4-108
=-112.
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