Question

 Khoanh vào 3 phân số bằng nhau:

A.1/3,2/6,3/6.

B.2/4,4/8,8/32.

C.4/3,8/6,16/6.

D.4/16,2/8,3/12.

Answer 1

ta có :

`a, 1/3=(1 xx2)/(3xx2)=2/6` `=>` sai

`b, 2/4= (2xx8)/(4xx8)=16/32=>` sai

`c, 4/3=(4xx2)/(3xx2)=8/6=>` sai

`d, 4/16=1/4 ; 2/8=1/4;3/12=1/4` 

`->D`

Answer 2

4/16=4:2/16:2=2/8

4/16=4:4/16:4=1/4=1x3/4x3=3/12

=> đáp án D