问题 解答题
计算下列各题
4
7
×
21
10
×
2
5
4
9
÷
5
6
×
5
8
2
3
÷25÷
4
5
12
13
×
1
4
÷
9
16
答案

(1)

4
7
×
21
10
×
2
5
=
12
25

(2)

4
9
÷
5
6
×
5
8

=

4
9
×
6
5
×
5
8

=

1
3

(3)

2
3
÷25÷
4
5

=

2
3
×
1
25
×
5
4

=

1
30

(4)

12
13
×
1
4
÷
9
16

=

12
13
×
1
4
×
16
9

=

16
39

判断题
问答题 简答题