Question

Tính nhẩm.

Answer 1

` 2xx1 = 2 `

`6:2 = 3`

`2xx7=14`

`10:2=5`

`5xx1=5`

`15:5=3`

`5xx9=45`

`18:2=9`

`35:5=7`

`5xx7=35`

`40:5=8`

`2xx6=12`

Answer 2

Xuất phát:

2 x 1 = 2

6 : 2 = 3

2 x  7 = 14

10 : 2 = 5

5 x 1 = 5 

15 : 5 = 3

5 x 9 = 45

18 : 2 = 9

35 : 5 = 7

5 x 7 = 35

40 : 5 = 8

2 x 6 = 12

Đích.