Question

Chi tiết giúp mik nha!

Answer 1

a) \(\dfrac{2}{3}+\dfrac{4}{15}=\dfrac{10}{15}+\dfrac{4}{15}=\dfrac{14}{15}\)

b) \(\dfrac{9}{10}-\dfrac{2}{5}=\dfrac{9}{10}-\dfrac{4}{10}=\dfrac{5}{10}=\dfrac{1}{2}\)

c) \(\dfrac{5}{3}\times\dfrac{9}{5}=\dfrac{45}{15}=3\)

d) \(\dfrac{3}{7}:2=\dfrac{3}{7}\times\dfrac{1}{2}=\dfrac{3}{14}\)

Answer 2

a  2/3 + 4/15= 10/15 + 4/15= 14/15

b, 9/10 - 2/5= 9/10 - 4/10 = 5/10 = 1/2

c, 5/3 x 9/5 = 9/3 = 3

d, 3/7 : 2= 3/7 : 2/1 = 3/7 x 1/2 = 3/14

Answer 3

Đg làm bài thi nên ko ai trl nha ^^