Question

2 примера в самом низу

Answer 1

Ответ:

1.  14

2. 12

Пошаговое объяснение:

1. 4 2/9 * 2 4/7 + 1 2/9 * 2 4/7 = 2 4/7 * (4 2/9 + 1 2/9)=

18/7 * 5 4/9 = 18/7 * 49/9 = 14

2. 2 5/6 * 6 2/3 + 3/10 * 6 2/3 - 6 2/3 * 1 1/3 =

6 2/3 * (2 5/6 + 3/10 - 1 1/3) = 20/3 * ( 17/6 + 3/10 - 4/3) =

20/3 * ((17*5 + 3*3 - 4*10)/30)) = 20/3 * ((85 + 9 - 40)/30)) =

20/3 * 54/30 = 36/3 = 12