题目内容
(1)-72+2×(-3)2+(-6)÷(-
)2
(2)2
-6
-(
)-1.
| 1 |
| 3 |
(2)2
| 12 |
|
| 1 |
| 2 |
(1)原式=-49+2×9+(-6)×9
=-49+18-54
=-85;
(2)原式=4
-6×
-2
=4
-2
-2
=2
-2.
=-49+18-54
=-85;
(2)原式=4
| 3 |
| 1 |
| 3 |
| 3 |
=4
| 3 |
| 3 |
=2
| 3 |
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