题目内容
计算:
(1)2×(-5)+22-3÷
;
(2)-(-3)2-3+0.4×[(-1
)]÷(-2).
(1)2×(-5)+22-3÷
1 |
2 |
(2)-(-3)2-3+0.4×[(-1
1 |
2 |
(1)原式=-10+4-6
=-12;
(2)原式=-9-3+
×(-
)×
=-12-
×(-
)
=-11.7.
=-12;
(2)原式=-9-3+
2 |
5 |
3 |
2 |
1 |
(-2) |
=-12-
3 |
5 |
1 |
2 |
=-11.7.
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