3/7 × (1/3/+ 4/9) = ?
Ответ:
Пошаговое объяснение:
·(+)=·=
3/7 × (1/3+ 4/9) =1/3
3/7*(1/3+4/9)=1/3
1/3 + 4/9 = 3/9 + 4/9 = 7/9
3/7 × 7/9 = 1/3