Question

a,2/5+3/4

b,2/3-3/8

c,3/7x4/5

d,2/5:2/3

Answer 1

a) 2/5 + 3/4 = 23/20 
b) 2/3 - 3/8 = 7/24 
c) 3/7 x 4/5 = 12/35 
d) 2/5 : 2/3 = 3/5 

Answer 2

\(\dfrac{2}{5}+\dfrac{3}{4}=\dfrac{8}{20}+\dfrac{15}{20}=\dfrac{22}{20}=\dfrac{11}{10}\)

\(\dfrac{2}{3}-\dfrac{3}{8}=\dfrac{16}{24}-\dfrac{9}{24}=\dfrac{7}{24}\)

\(\dfrac{3}{7}\times\dfrac{4}{5}=\dfrac{12}{35}\)

\(\dfrac{2}{5}:\dfrac{2}{3}=\dfrac{3}{5}\)

Answer 3

\(\dfrac{2}{5}+\dfrac{3}{4}=\dfrac{8}{20}+\dfrac{15}{20}=\dfrac{23}{20}\)

\(\dfrac{2}{3}-\dfrac{3}{8}=\dfrac{16}{24}-\dfrac{9}{24}=\dfrac{7}{24}\)

\(\dfrac{3}{7}x\dfrac{4}{5}=\dfrac{12}{35}\)

\(\dfrac{2}{5}:\dfrac{2}{3}=\dfrac{2}{5}x\dfrac{3}{2}=\dfrac{3}{5}\)

Answer 4

a,\(\dfrac{2}{5}+\dfrac{3}{4}=\dfrac{8}{20}+\dfrac{15}{20}=\dfrac{23}{20}\)

b,\(\dfrac{2}{3}-\dfrac{3}{8}=\dfrac{16}{24}-\dfrac{9}{24}=\dfrac{7}{24}\)

c,\(\dfrac{3}{7}\times\dfrac{4}{5}=\dfrac{12}{35}\)

d,\(\dfrac{2}{5}\div\dfrac{2}{3}=\dfrac{2}{5}\times\dfrac{3}{2}=\dfrac{6}{10}\)