题目内容
计算:(1)-23÷
×(1-
)2
(2)28×
-(-28)×0.5+28×(-
).
| 2 |
| 3 |
| 1 |
| 3 |
(2)28×
| 3 |
| 4 |
| 1 |
| 4 |
(1)原式=-8×
×
=-
;
(2)原式=21+14-7=28.
| 3 |
| 2 |
| 4 |
| 9 |
| 16 |
| 3 |
(2)原式=21+14-7=28.
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