问题 解答题
下面各题怎样简便就怎样计算.
1
4
+
2
3
÷
1
24

3
8
×
2
5
+
2
5
×
5
8

51÷
4
9
×
2
9
答案

(1)(

1
4
+
2
3
÷
1
24

=(

1
4
+
2
3
)×24,

=

1
4
×24+
2
3
×24,

=6+16,

=22;

(2)

3
8
×
2
5
+
2
5
×
5
8

=

2
5
×(
3
8
+
5
8
),

=

2
5
×1,

=

2
5

(3)51÷

4
9
×
2
9

=51×

9
4
×
2
9

=

51
2

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