Question

Выполните действия : 7/9+4/6 , 2) 1/2+(3/7-0,45)

Answer 1

$frac{7}{9} + frac{4}{6} = frac{14+12}{18} = frac{26}{18} = frac{13}{9} =1 frac{4}{9}$

$frac{1}{2} +( frac{3}{7}- frac{9}{20} )= frac{1}{2} +frac{60-63}{140} = frac{1}{2} - frac{3}{140} = frac{67}{140}$