1/2 + 1/3 . 1/2 + 2/3 = Tính nhanh

2 câu trả lời

`#Aka#`

`1/2 + 1/3 . 1/2 + 2/3`

`=1/2 .(1+1/3)+2/3`

`=1/2 .(3/3+1/3)+2/3`

`=1/2 .4/3+2/3`

`=2/3+2/3`

`=4/3`

`1/2 + 1/3 . 1/2 + 2/3`

`= 1/2 . 1 + 1/3 . 1/2 + 2/3`

`= 1/2 .  ( 1 + 1/3) + 2/3`

`= 1/2 . 4/3 + 2/3`

`= 2/3 + 2/3`

`= 4/3`

`#caty09`