Question

Số?

a) \(\dfrac{7}{15}+\dfrac{?}{15}=\dfrac{10}{15}\)                        b) \(\dfrac{9}{8}+\dfrac{2}{?}=\dfrac{11}{8}\)                      c) \(\dfrac{6}{21}+\dfrac{9}{21}=\dfrac{15}{?}\)

Answer 1

a) \(\dfrac{7}{15}+\dfrac{3}{15}=\dfrac{10}{15}\)

b) \(\dfrac{9}{8}+\dfrac{2}{8}=\dfrac{11}{8}\)

c) \(\dfrac{6}{21}+\dfrac{9}{21}=\dfrac{15}{21}\)