\(\frac{12}{1}:\frac{6}{5}+\frac{4}{7}=\frac{60}{6}+\frac{7}{4}=\frac{10}{1}+\frac{7}{4}=\frac{40}{4}+\frac{7}{4}=\frac{47}{4}\)
\(\left(\frac{5}{6}+\frac{3}{4}\right)\cdot\frac{8}{19}=\frac{38}{24}\cdot\frac{18}{9}=\frac{38}{24}\cdot2=\frac{76}{24}=\frac{19}{6}\)
\(\left(\frac{7}{4}-\frac{5}{3}\right)\cdot\frac{2}{3}=\frac{1}{12}\cdot\frac{2}{3}=\frac{1}{13}\)
câu 1 : 62/35
câu 2 : 2/3
câu 3 : 1/18
nhớ tk m nhé
câu 1: 12:6/5+4/7=47/21
câu 2: (5/6+3/4):19/8=2/3
câu 3: (7/4-5/3):3/2=1/18
Câu 1:
12:6/5+4/7
=10+4/7
=74/7
Câu 2:
(5/6+3/4):19/8
=19/12:19/8
=2/3
Câu 3:
(7/4-5/3):3/2
1/12:3/2
=1/18