Question

Đ, S?

a) \(\dfrac{1}{2}-\dfrac{1}{8}=\dfrac{3}{8}\)                                  b) \(\dfrac{7}{10}-\dfrac{1}{5}=\dfrac{6}{5}\) 

c) \(\dfrac{5}{4}+\dfrac{5}{12}=\dfrac{5}{16}\)                               d) \(\dfrac{3}{6}+\dfrac{2}{3}=\dfrac{7}{6}\) 

Answer 1

a) Đ

b) S 

\(\dfrac{7}{10}-\dfrac{1}{5} \\ =\dfrac{7}{10}-\dfrac{2}{10}\\ =\dfrac{5}{10}=\dfrac{1}{2}\)

c) S

\(\dfrac{5}{4}+\dfrac{5}{12}\\ =\dfrac{15}{12}+\dfrac{5}{12}\\ =\dfrac{20}{12}=\dfrac{5}{3}\)

d) Đ