题目内容
计算:
(1)5-3÷2×
-|-2|2÷(-
)
(2)-1-(-3)3+[3+0.4×(-1
)]÷(-2).
(1)5-3÷2×
1 |
2 |
1 |
2 |
(2)-1-(-3)3+[3+0.4×(-1
1 |
2 |
(1)原式=5-3×
×
-4×(-2)
=-5-
+8
=2
;
(2)原式=-1+27+[3+
×(-
)]÷(-2)
=-1+27-
=24
.
1 |
2 |
1 |
2 |
=-5-
3 |
4 |
=2
1 |
4 |
(2)原式=-1+27+[3+
2 |
5 |
3 |
2 |
=-1+27-
6 |
5 |
=24
4 |
5 |
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