g: \(-\frac{3}{13}\cdot\frac68+\frac{7}{13}\cdot\frac{-3}{8}+1\frac38\)
\(=-\frac38\left(\frac{6}{13}+\frac{7}{13}\right)+1+\frac38\)
\(=-\frac38+1+\frac38=1\)
f: \(-\frac57\cdot\frac{2}{11}-\frac{5}{11}\cdot\frac97+2\frac57\)
\(=-\frac57\left(\frac{2}{11}+\frac{9}{11}\right)+2+\frac57\)
\(=-\frac57+2+\frac57=2\)
e: \(5\frac35+7\frac{21}{48}:\frac{10}{7}-5\frac{21}{48}:\frac{10}{7}\)
\(=\frac{28}{5}+\left(7+\frac{21}{48}-5-\frac{21}{48}\right):\frac{10}{7}\)
\(=\frac{28}{5}+2\cdot\frac{7}{10}=\frac{28}{5}+\frac75=\frac{35}{5}=7\)
Đúng 0
Bình luận (0)
