Question

Tính nhẩm.

Answer 1

` 10 : 5 = 2`

` 12 :2 = 6`

` 20 :5 = 4 `

 

`14 : 2 = 7`

` 15 : 5 = 3 `

`40 : 5 = 8`

Answer 2

Ta có:

10 : 5 = 2

12 : 2 = 6

20 : 5 = 4

 

14 : 2 = 7

15 : 5 = 3

40 : 5 = 8

Answer 3

10 : 5 = 2

12 : 2 = 6

20 : 5 = 4

14 : 2 = 7

15 : 5 = 3

40 : 5 = 8

Answer 4

10 : 5 = 2

12 : 2 = 6

20 : 5 = 4

14 : 2 = 7

15 : 5 = 3

40 : 5 = 8