Question

giải đầy đủ giúp mik với

Answer 1

=2/9+10/3

=32/9

b,7/2+2/7

=53/14

Answer 2

Answer 3

`a)` \(\dfrac{2}{9}+\dfrac{5}{7}\times\dfrac{14}{3} =\dfrac{2}{9}+\dfrac{10}{3}=\dfrac{2}{9}+\dfrac{30}{9}=\dfrac{32}{9}\)

`b)` \(\dfrac{7}{2}+\dfrac{6}{7}:3=\dfrac{7}{2}+\dfrac{6}{7}\times\dfrac{1}{3}=\dfrac{7}{2}+\dfrac{2}{7}=\dfrac{49}{14}+\dfrac{4}{14}=\dfrac{53}{14}\)

Answer 4

a, \(\dfrac{2}{9}+\dfrac{5}{7}x\dfrac{14}{3}=\dfrac{2}{9}+\dfrac{70}{21}=\dfrac{32}{9}\)

b, \(\dfrac{7}{2}+\dfrac{6}{7}:3=\dfrac{7}{2}+\dfrac{6}{7}:\dfrac{3}{1}=\dfrac{7}{2}+\dfrac{6}{21}=\dfrac{55}{21}\)

Answer 5

= 53/14