Question

вычеслите (4/5+4/7) (3 3/8+2 11/4)​

Answer 1

$(frac{4}{5} + frac{4}{7} )(3 frac{3}{8} + 2 frac{11}{4} ) = ( frac{28 + 20}{35} )(5 frac{3 + 22}{8} ) = frac{48 times 65}{35 times 8} = frac{6 times 13}{7} = frac{78}{7}$

Ответ

$frac{78}{7}$