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\(\frac{18}{63}=\frac{18:9}{63:9}=\frac{2}{7}\)
\(\frac{54}{12}=\frac{54:6}{12:6}=\frac{9}{2}\)
\(\frac{27}{45}=\frac{27:9}{45:9}=\frac{3}{5}\)
\(\frac{135}{315}=\frac{135:45}{315:45}=\frac{3}{7}\)
\(\frac{12}{30}=\frac{12:6}{30:6}=\frac{2}{5}\)
\(\frac{20}{45}=\frac{20:5}{45:5}=\frac{4}{9}\)
\(\frac{28}{70}=\frac{28:14}{70:14}=\frac{2}{5}\)
\(\frac{34}{51}=\frac{34:17}{51:17}=\frac{2}{3}\)
a)\(\frac{15}{18}=\frac{15:3}{18:3}=\frac{5}{6}\)
b)\(\frac{30}{120}=\frac{30:30}{120:30}=\frac{1}{4}\)
c)\(\frac{45}{27}=\frac{45:9}{27:9}=\frac{5}{3}\)
d)\(\frac{75}{300}=\frac{75:75}{300:75}=\frac{1}{4}\)
\(\frac{6}{9}=\frac{6:3}{9:3}=\frac{2}{3}\)
\(\frac{18}{48}=\frac{18:6}{48:6}=\frac{3}{8}\)
\(\frac{72}{84}=\frac{72:12}{84:12}=\frac{6}{7}\)
\(\frac{60}{120}=\frac{60:60}{120:60}=\frac{1}{2}\)
\(\frac{6}{9}=\frac{6\div3}{9\div3}=\frac{2}{3}\)
\(\frac{18}{48}=\frac{18\div6}{48\div6}=\frac{3}{8}\)
\(\frac{72}{84}=\frac{72\div12}{84\div12}=\frac{6}{7}\)
\(\frac{60}{120}=\frac{60\div60}{120\div60}=\frac{1}{2}\)
\(\frac{70}{45}=\frac{70\div5}{45\div5}=\frac{14}{9}\)
\(\frac{18}{54}=\frac{18\div18}{54\div18}=\frac{1}{3}\)
Chú ý : Dấu này \(\div\) là dấu chia nha
a 10/7 b 1/3