Question

Các bạn ơi, giúp mk nhé

Answer 1

Đi mừ, mk xin các bn đó

Answer 2

\(\dfrac{2}{3}+\dfrac{2}{5}=\dfrac{16}{15}\)

\(\dfrac{7}{3}-2=\dfrac{1}{3}\)

Answer 3

2/3 + 2/5 = 10/15 + 6/15 = 16/15
1/2 x 6/7 = 3/7
2/9 x 4 + 1/3 = 8/9 + 1/3 = 8/9 + 3/9 = 11/9
5 - 3/5 : 9/10 = 5 - 3/5 x 10/9 = 5 - 2/3 = 15/3 - 2/3 = 13/3
7/3 - 2 = 7/3 - 6/3 = 1/3
12/7 : 3/14 = 12/7 x 14/3 = 8

Answer 4

\(\dfrac{1}{2}.\dfrac{6}{7}=\dfrac{3}{7}\)

\(\dfrac{12}{7}:\dfrac{3}{14}=8\)

\(\dfrac{2}{9}.4+\dfrac{1}{3}=\dfrac{8}{9}+\dfrac{1}{3}=\dfrac{11}{9}\)

\(5-\dfrac{3}{5}:\dfrac{9}{10}=5-\dfrac{2}{3}=\dfrac{13}{3}\)

Answer 5

Dạ em cảm ơn mn ạ

Answer 6

\(\dfrac{2}{3}+\dfrac{2}{5}=\dfrac{10+6}{15}=\dfrac{16}{15}\)

\(\dfrac{1}{2}.\dfrac{6}{7}=\dfrac{6}{14}\)

\(\dfrac{2}{9}.\dfrac{4}{1}+\dfrac{1}{3}=\dfrac{8}{9}+\dfrac{1}{3}=\dfrac{8+3}{9}=\dfrac{11}{9}\)

\(\dfrac{5}{1}-\dfrac{3}{5}:\dfrac{9}{10}=\dfrac{5}{1}-\dfrac{30}{45}=\dfrac{225-30}{45}=\dfrac{195}{45}\)

\(\dfrac{7}{3}-\dfrac{2}{1}=\dfrac{7-6}{3}=\dfrac{1}{3}\)

\(\dfrac{12}{7}:\dfrac{3}{14}=\dfrac{12}{7}.\dfrac{14}{7}=\dfrac{168}{49}\)