Question

quy đồng mẫu số ê phân số: 2/3; 4/5; 7/15

 

Answer 1

MSC : \(15\)

Giữ nguyên : \(\dfrac{7}{15}\)

\(\dfrac{2}{3}=\dfrac{2.5}{3.5}=\dfrac{10}{15}\\ \dfrac{4}{5}=\dfrac{4.5}{5.3}=\dfrac{20}{15}\)

Answer 2

\(MSC:15\)

\(\dfrac{2}{3}=\dfrac{2.5}{3.5}=\dfrac{10}{15}\)

\(\dfrac{4}{5}=\dfrac{4.3}{5.3}=\dfrac{12}{15}\)

\(\dfrac{7}{15}\) giữ nguyên