4/7 x 5/3 = 20/21
6/7 : 3/2 = 4/7
11/12 : 1/6 = 11/2
2/3:+3/4+1/6 ??? cả chia cả cộng ???
15/10 - 3/4 + 5/9 x 3/7 = 83/84
4/7*5/3=20/21
6/7:3/2=4/7
11/12:1/6=11/2
2/3:+3/4+1/6=19/18
15/10-3/4+5/9*3/7=83/84
\(\frac{4}{7}\)x \(\frac{5}{3}\)= \(\frac{20}{21}\)
\(\frac{6}{7}\)x \(\frac{2}{3}\)= \(\frac{12}{21}\)= \(\frac{4}{7}\)
\(\frac{11}{12}\)x \(\frac{6}{1}\)= \(\frac{66}{12}\)= \(\frac{22}{4}\)
\(\frac{2}{3}\)x \(\frac{4}{3}\)= \(\frac{8}{9}\)+ \(\frac{1}{6}\)= \(\frac{57}{54}=\frac{19}{18}\)
\(\frac{15}{10}-\frac{3}{4}=\frac{15}{20}=\frac{3}{4}+\frac{5}{9}=\frac{3}{4}\cdot\frac{3}{7}=\frac{9}{28}\)
