题目内容
计算题:
(1)12+(-7
)-(-18)-32.5;
(2)(-
)÷
×3×(-1
);
(3)(
-
+
)÷(-
);
(4)(-1)3+[(-3)2+(3-22)×2].
(1)12+(-7
| 1 |
| 2 |
(2)(-
| 3 |
| 5 |
| 1 |
| 3 |
| 1 |
| 9 |
(3)(
| 5 |
| 8 |
| 1 |
| 6 |
| 7 |
| 12 |
| 1 |
| 24 |
(4)(-1)3+[(-3)2+(3-22)×2].
(1)原式=12-7
+18-32.5
=30-40
=-10;
(2)原式=(-
)×3×3×(-
)
=6;
(3)原式=(
-
+
)×(-24)
=-15+4-14
=-25;
(4)原式=-1+[9+(3-4)×2]
=-1+(9-2)
=-1+7
=6.
| 1 |
| 2 |
=30-40
=-10;
(2)原式=(-
| 3 |
| 5 |
| 10 |
| 9 |
=6;
(3)原式=(
| 5 |
| 8 |
| 1 |
| 6 |
| 7 |
| 12 |
=-15+4-14
=-25;
(4)原式=-1+[9+(3-4)×2]
=-1+(9-2)
=-1+7
=6.
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