题目内容
计算
(1)2.5+(-2)÷
×(-
)-3.5
(2)-14÷[-22+(-
)2×(-3)3].
(1)2.5+(-2)÷
| 2 |
| 5 |
| 1 |
| 5 |
(2)-14÷[-22+(-
| 2 |
| 3 |
(1)原式=2.5+2×
×
-3.5
=2.5+1-3.5
=0;
(2)原式=-14÷[-4+
×(-27)]
=-14÷(-4-12)
=-14÷(-16)
=
.
| 5 |
| 2 |
| 1 |
| 5 |
=2.5+1-3.5
=0;
(2)原式=-14÷[-4+
| 4 |
| 9 |
=-14÷(-4-12)
=-14÷(-16)
=
| 7 |
| 8 |
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