题目内容
计算一:
(1)(+3)+(-2)
(2)(-4)-1
(3)-5×3
(4)(-
)×4
(5)-
×(-6).
(1)(+3)+(-2)
(2)(-4)-1
(3)-5×3
(4)(-
| 1 |
| 2 |
(5)-
| 2 |
| 3 |
(1)(+3)+(-2)=1;
(2)(-4)-1=-5;
(3)-5×3=-15;
(4)(-
)×4=-2;
(5)-
×(-6)=4.
(2)(-4)-1=-5;
(3)-5×3=-15;
(4)(-
| 1 |
| 2 |
(5)-
| 2 |
| 3 |
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