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计算下面各题,能简算的简算.37×85+47÷5834×40%+0.75×355-78-0.1251835÷0.9×56
题目详情
计算下面各题,能简算的简算.
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▼优质解答
答案和解析
(1)
×
+
÷
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)
×40%+0.75×
,
=0.75×0.4+0.75×0.6,
=0.75×(0.4+0.6),
=0.75×1,
=0.75;
(3)5-
-0.125,
=5-0.875-0.125,
=5-(0.875+0.125),
=5-1,
=4;
(4)
÷0.9×
,
=
×
,
=
.
3 |
7 |
8 |
5 |
4 |
7 |
5 |
8 |
=
3 |
7 |
8 |
5 |
4 |
7 |
8 |
5 |
=(
3 |
7 |
4 |
7 |
8 |
5 |
=1×
8 |
5 |
=
8 |
5 |
(2)
3 |
4 |
3 |
5 |
=0.75×0.4+0.75×0.6,
=0.75×(0.4+0.6),
=0.75×1,
=0.75;
(3)5-
7 |
8 |
=5-0.875-0.125,
=5-(0.875+0.125),
=5-1,
=4;
(4)
18 |
35 |
5 |
6 |
=
4 |
7 |
5 |
6 |
=
10 |
21 |
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