Question

Số?

a) \(\dfrac{2}{5}=\dfrac{2\times?}{5\times?}=\dfrac{10}{25}\)                    \(\dfrac{4}{7}=\dfrac{4\times2}{7\times?}=\dfrac{?}{?}\)       

b) \(\dfrac{36}{40}=\dfrac{36:?}{40:?}=\dfrac{9}{10}\)                 \(\dfrac{24}{32}=\dfrac{24:?}{32:8}=\dfrac{?}{?}\)    

Answer 1

a) \(\dfrac{2}{5}=\dfrac{2\times5}{5\times2}=\dfrac{10}{25}\)

\(\dfrac{4}{7}=\dfrac{4\times2}{7\times2}=\dfrac{8}{14}\)

b) \(\dfrac{36}{40}=\dfrac{36:4}{40:4}=\dfrac{9}{10}\)

\(\dfrac{24}{32}=\dfrac{24:8}{32:8}=\dfrac{3}{4}\)