Question

QUY DONG CAC PHAN SO SAU: \(\frac{6}{30}\)VA\(\frac{4}{10}\)VA\(\frac{15}{20}\)

Answer 1

Rút gọn:\(\frac{6}{30}=\frac{6:6}{30:6}=\frac{1}{5}\)

             \(\frac{4}{10}=\frac{4:2}{10:2}=\frac{2}{5}\)

             \(\frac{15}{20}=\frac{15:5}{20:5}=\frac{3}{4}\)

MSC:20

Quy đồng:  \(\frac{1}{5}=\frac{1.4}{5.4}=\frac{4}{20}\)

                \(\frac{2}{5}=\frac{2.4}{5.4}=\frac{8}{20}\)

                 \(\frac{3}{4}=\frac{3.5}{4.5}=\frac{15}{20}\)

Answer 2

\(\frac{4}{20}và\frac{8}{20}va\frac{15}{20}\)

Answer 3

\(\frac{6:3x2}{30:3x2}=\frac{4}{20}\)

\(\frac{4x2}{10x2}=\frac{8}{20}\)