问题 解答题
7
9
×18
21÷
7
9
3
10
÷
2
5
24÷
2
9
×18
答案

(1)

7
9
×18=14;

(2)21÷

7
9

=21×

9
7

=27;

(3)

3
10
÷
2
5

=

3
10
×
5
2

=

3
4

(4)24÷

2
9
×18,

=24×

9
2
×18,

=1944.

单项选择题
单项选择题