Question

直接写得数． 4 7 ×21 = 18÷ 3 5 = 1 3 + 2 5 = 10 9 × 6 5 = 5 8 - 1

Answer 1

4

7 ×21=12；

18÷

3

5 =18×

5

3 =30；

1

3 +

2

5 =

5

15 +

6

15 =

11

15 ；

10

9 ×

6

5 =

4

3 ；

5

8 -

1

4 =

5

8 -

2

8 =

3

8 ；

4

5 ÷

8

15 =

4

5 ×

15

8 =

3

2 ；

0÷

11

12 =0；

4

9 ÷

9

4 =

4

9 ×

4

9 =

16

81 ．