Question

Answer 1

Mong mọi người giúp

Answer 2

a)\(=\dfrac{7}{4}-\dfrac{1}{4}=\dfrac{6}{4}=\dfrac{3}{2}\)

Answer 3

b)\(=\dfrac{7}{2}\times\dfrac{4}{7}+0=\dfrac{4}{2}=2\)

Answer 4

c)\(\dfrac{8}{5}-\dfrac{3}{2}+\dfrac{1}{5}=\dfrac{16}{10}-\dfrac{15}{10}+\dfrac{2}{10}=\dfrac{3}{10}\)