摘要: 24.用简便方法计算:
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计算:
(1)-
-(-
)-(-
)-
(2)(-81)÷
×
÷(-16)
(3)(-
+
+
-
)×(-62)(用简便运算)
(4)-24+3×(-1)4-(-2)3.
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(1)-
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 2 |
(2)(-81)÷
| 9 |
| 4 |
| 4 |
| 9 |
(3)(-
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
| 3 |
| 4 |
(4)-24+3×(-1)4-(-2)3.