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a,\(\dfrac{44}{77}=\dfrac{44:11}{77:11}=\dfrac{4}{7}\)
b\(\dfrac{72}{90}=\dfrac{72:9}{90:9}=\dfrac{8}{9}\)
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\(\Rightarrow\)
\(\text{Ta có :}\)
\(\frac{35\cdot48\cdot47}{25\cdot54\cdot72}=\frac{7\cdot5\cdot6\cdot8\cdot47}{5\cdot5\cdot9\cdot6\cdot8\cdot7}=\frac{47}{5\cdot9}=\frac{47}{45}\)
\(\text{Chúc bạn học tốt !}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Rút gọn P/S : \(\frac{81}{54}\)
\(\frac{81}{54}=\frac{81:9}{54:9}=\frac{9}{6}=\frac{9:3}{6:3}=\frac{3}{2}\)
@Trunglaai?
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{6}{9}=\frac{6:3}{9:3}=\frac{2}{3}\)
\(\frac{18}{48}=\frac{18:6}{48:6}=\frac{3}{8}\)
\(\frac{72}{84}=\frac{72:12}{84:12}=\frac{6}{7}\)
\(\frac{60}{120}=\frac{60:60}{120:60}=\frac{1}{2}\)
\(\frac{6}{9}=\frac{6\div3}{9\div3}=\frac{2}{3}\)
\(\frac{18}{48}=\frac{18\div6}{48\div6}=\frac{3}{8}\)
\(\frac{72}{84}=\frac{72\div12}{84\div12}=\frac{6}{7}\)
\(\frac{60}{120}=\frac{60\div60}{120\div60}=\frac{1}{2}\)
\(\frac{72}{54}=\frac{4}{3}\)