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脱式计算,能简便的简便.4.2-1.38+5.8-3.620.125×0.25×322÷23−23÷2335×2.65−335+335×8.35
题目详情
脱式计算,能简便的简便.
4.2-1.38+5.8-3.62 | 0.125×0.25×32 | ||||||||||
2÷
| 3
|
▼优质解答
答案和解析
(1)4.2-1.38+5.8-3.62,
=4.2+5.8-(1.38+3.62),
=10-5,
=5;
(2)0.125×0.25×32,
=(0.125×8)×(0.25×4),
=1×1,
=1;
(3)2÷
−
÷2,
=2×
−
×
,
=3−
,
=2
;
(4)3
×2.65−3
+3
×8.35,
=3.6×(2.65+8.35-1),
=3.6×10,
=36.
=4.2+5.8-(1.38+3.62),
=10-5,
=5;
(2)0.125×0.25×32,
=(0.125×8)×(0.25×4),
=1×1,
=1;
(3)2÷
2 |
3 |
2 |
3 |
=2×
3 |
2 |
2 |
3 |
1 |
2 |
=3−
1 |
3 |
=2
2 |
3 |
(4)3
3 |
5 |
3 |
5 |
3 |
5 |
=3.6×(2.65+8.35-1),
=3.6×10,
=36.
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