Question

tính:

a)                                 b)

\(\frac{3}{7}+\frac{4}{5}+2=?\)  \(\frac{3}{24}+\frac{1}{6}+\frac{5}{6}+\frac{7}{12}=?\)

Answer 1

\(\frac{3}{24}+\frac{1}{6}\)\(+\)\(\frac{5}{6}+\frac{7}{12}\)

\(=\frac{3}{24}+\frac{4}{24}+\frac{20}{24}+\frac{14}{24}\)

\(=\frac{3+4+20+14}{24}\)

\(=\frac{41}{24}\)

Answer 2

\(\frac{3}{7}+\frac{4}{5}+\frac{2}{1}\)

\(=\frac{15}{35}+\frac{28}{35}+\frac{2}{1}\)

= \(\frac{15}{35}+\frac{28}{35}+\frac{70}{35}\)

\(\frac{15+28+70}{35}\)

\(=\frac{113}{35}\)