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计算下面各题,能简算的要用简便方法算.4÷45-45÷438×1.25+15÷80%+1.25×2718×58+18×41+1813×(213+211×11)(38+127)×16+112737×115+47÷15.
题目详情
计算下面各题,能简算的要用简便方法算. 4÷
| 38×1.25+15÷80%+1.25×27 |
| ||||||||||||||||
13×(
| (
|
|
▼优质解答
答案和解析
(1)4÷
-
÷4,
=4×
-
×
,
=5-
,
=4
;
(2)38×1.25+15÷80%+1.25×27,
=(38+27)×1.25+15÷
,
=65×
+15×
,
=(65+15)×
,
=80×
,
=100;
(3)
×58+
×41+
,
=(58+41+1)×
,
=100×
,
=12.5;
(4)13×(
+
×11),
=13×(
+2),
=13×
+13×2,
=2+26,
=28;
(5)(
+
)×16+
,
=
×16+
×16+
,
=6+(
+
),
=6+1,
=7.
4 |
5 |
4 |
5 |
=4×
5 |
4 |
4 |
5 |
1 |
4 |
=5-
1 |
5 |
=4
4 |
5 |
(2)38×1.25+15÷80%+1.25×27,
=(38+27)×1.25+15÷
4 |
5 |
=65×
5 |
4 |
5 |
4 |
=(65+15)×
5 |
4 |
=80×
5 |
4 |
=100;
(3)
1 |
8 |
1 |
8 |
1 |
8 |
=(58+41+1)×
1 |
8 |
=100×
1 |
8 |
=12.5;
(4)13×(
2 |
13 |
2 |
11 |
=13×(
2 |
13 |
=13×
2 |
13 |
=2+26,
=28;
(5)(
3 |
8 |
1 |
27 |
11 |
27 |
=
3 |
8 |
1 |
27 |
11 |
27 |
=6+(
16 |
27 |
11 |
27 |
=6+1,
=7.
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