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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
5
-
4
5
÷4       
38×1.25+15÷80%+1.25×27    
1
8
×58+
1
8
×41+
1
8
13×(
2
13
+
2
11
×11 ) 
3
8
+
1
27
)×16+
11
27
  
 
3
7
×
1
15
+
4
7
÷15.
▼优质解答
答案和解析
(1)4÷
4
5
-
4
5
÷4,
=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
+15×
5
4

=(65+15)×
5
4

=80×
5
4

=100;

(3)
1
8
×58+
1
8
×41+
1
8

=(58+41+1)×
1
8

=100×
1
8

=12.5;

(4)13×(
2
13
+
2
11
×11),
=13×(
2
13
+2),
=13×
2
13
+13×2,
=2+26,
=28;

(5)(
3
8
+
1
27
)×16+
11
27

=
3
8
×16+
1
27
×16+
11
27

=6+(
16
27
+
11
27
),
=6+1,
=7.