Question

Сколько будет 2 целых 4 9 -ых –1целую 7 9 ых

Answer 1

2 49 - 1 79 = (2-1) (49 - 79) = 1 (49 - 79) = 99+49-79 = (9+4-7) 9=
= 69 = 23

Answer 2

...=22/9 - 16/9 = 6/9 = 2/3 = 0,(6).