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能简算的用简便方法计算.(54+913)÷913÷(14+56)×34(56-34)÷3103.1×99+3.157×16.31-2.31÷7536÷[(56-13)×3].

题目详情
能简算的用简便方法计算.
(54+
9
13
)÷9          
13÷(
1
4
+
5
6
3
4

5
6
-
3
4
)÷
3
10

3.1×99+3.1          
5
7
×16.31-2.31÷
7
5

36÷[(
5
6
-
1
3
)×3].
▼优质解答
答案和解析
(1)(54+
9
13
)÷9,
=(54+
9
13
)×
1
9

=54×
1
9
+
9
13
×
1
9

=6+
1
13

=6
1
13

(2)13÷(
1
4
+
5
6
)×
3
4

=13×
12
13
×
3
4

=9;
(3)(
5
6
-
3
4
)÷
3
10

=
1
12
÷
3
10

=
5
18

(4)3.1×99+3.1,
=3.1×(99+1),
=3.1×100,
=310;   
(5)
5
7
×16.31-2.31÷
7
5

=
5
7
×16.31-2.31×
5
7

=
5
7
×(16.31-2.31),
=
5
7
×14,
=10;
(6)36÷[(
5
6
-
1
3
)×3],
=36÷[
1
2
×3],
=36÷
3
2

=24.