Rút gọn:
\(A=\frac{2483-13}{4966-26}=\frac{13.\left(191-1\right)}{26.\left(191-1\right)}\)
\(=\frac{13.190}{26.190}=\frac{13}{26}=\frac{1}{2}\)
\(B=\frac{2727-101}{7575+303}=\frac{101.\left(27+1\right)}{303.\left(25+1\right)}\)
\(=\frac{101.26}{303.26}=\frac{101}{303}=\frac{1}{3}\)
Quy đồng:
\(\frac{1}{2}\)và \(\frac{1}{3}\)
\(\frac{1}{2}=\frac{1.3}{2.3}=\frac{3}{6}\) \(\frac{1}{3}=\frac{1.2}{3.2}=\frac{2}{6}\)