题目内容
计算
(1)(-0.62)-(-3
)-(-2.62)+(-
)
(2)(-
+
-
)×(-24)
(3)-14+2×(-3)2-5÷
×2.
(1)(-0.62)-(-3
| 2 |
| 5 |
| 3 |
| 5 |
(2)(-
| 3 |
| 4 |
| 7 |
| 12 |
| 5 |
| 8 |
(3)-14+2×(-3)2-5÷
| 1 |
| 2 |
(1)原式=-0.62+3
+2.62-
=2+2
=4
;
(2)原式=-24×(-
)-24×
-24×(-
)=18-14+15=19;
(3)原式=-1+2×9-5×2×2=-1+18-20=-3.
| 2 |
| 5 |
| 3 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
(2)原式=-24×(-
| 3 |
| 4 |
| 7 |
| 12 |
| 5 |
| 8 |
(3)原式=-1+2×9-5×2×2=-1+18-20=-3.
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