Question

3  4/7+ 2  2/5+ 2 3/7

Answer 1

\(\left(3\frac{4}{7}+2\frac{3}{7}\right)+2\frac{2}{5}=6+2\frac{2}{5}=8\frac{2}{5}\)

Answer 2

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

\(=\left(3+2+2\right)+\left(\frac{4}{7}+\frac{3}{7}\right)+\frac{2}{5}=7+1+\frac{2}{5}=8\frac{2}{5}\)