问题 解答题
下面各题,怎样简便就怎样算.
3
4
÷
1
2
÷
15
14
4
9
+
2
15
)÷
2
15
3
20
÷0.2×
2
3
答案

(1)

3
4
÷
1
2
÷
15
14

=

3
4
×2×
14
15

=

3
2
×
14
15

=1

2
5

(2)(

4
9
+
2
15
)÷
2
15

=(

4
9
+
2
15
)×
15
2

=

4
9
×
15
2
+
2
15
×
15
2

=

10
3
+1,

=4

1
3

(3)

3
20
÷0.2×
2
3

=

3
20
÷
1
5
×
2
3

=

3
20
×5×
2
3

=

1
2

单项选择题
填空题