Question

[Lưu kim linh]

tính:

a).2/3x4/7

8/21:2/3

8/21:4/7

4/7x2/3

lafm đầy đủ + có rút gọn thì rút mới tick.lẹ nhé

Answer 1

[Đặng Thùy Liên]

a)2/3x4/7=8/21

b)8/21:2/3=8/21x3/2=24/42=4/7

c)8/21:4/7=8/21x7/4=56/85=7//12

d)4/7X2/3=8/21

Answer 2

[Mai xuân]

a)\(\frac{2}{3}\cdot\frac{4}{7}=\frac{8}{21}\)

b)\(\frac{8}{21}:\frac{2}{3}=\frac{8}{21}\cdot\frac{3}{2}=\frac{4}{7}\)

c)\(\frac{8}{21}:\frac{4}{7}=\frac{8}{21}\cdot\frac{7}{4}=\frac{2}{3}\)

d)\(\frac{4}{7}\cdot\frac{2}{3}=\frac{8}{21}\)