计算:
(1)23×(-5)-(-3)÷
;
(2)(7m2n-5mn)-(4m2n-5mn);
(3)(-
)×(
-
)×
÷(-
);
(4)-23+[(-4)2-(1-32)×3].
(1)23×(-5)-(-3)÷
| 3 |
| 128 |
(2)(7m2n-5mn)-(4m2n-5mn);
(3)(-
| 7 |
| 2 |
| 1 |
| 6 |
| 1 |
| 2 |
| 3 |
| 14 |
| 1 |
| 2 |
(4)-23+[(-4)2-(1-32)×3].
| 3 |
| 128 |
| 7 |
| 2 |
| 1 |
| 6 |
| 1 |
| 2 |
| 3 |
| 14 |
| 1 |
| 2 |