Пошаговое объяснение:

№1

8(1 + 1/8) = 8*1 + 8*1/8 = 8 + 8/8 = 8 + 1 = 9

9(1 - 1/9) = 9*1 - 9*1/9 = 9 - 9/9 = 9 - 1 = 8

№2

3 2/7 * 7 1/6 + 2 5/7 * 7 1/6 = 7 1/6 * (3 2/7 + 2 5/7) = 7 1/6 * 5 7/7 = 43/6 * 6 = 43/1 * 1 = 43/1 = 43

№3

0,1 * 10 = 1

7/16 * 8 = 7/2 * 1 = 7/2 = 3 1/2

Ответ:

Пошаговое объяснение:

1)

8 * (1 + 1/8) = 8 * 1 + 8 * 1/8 = 8 + 8/8 = 8 + 1 = 9

9 * (1 - 1/9) = 9 * 1 - 9 * 1/9 = 9 - 9/9 = 9 - 1 = 8

2)

3 2/7 * 7 1/6 + 2 5/7 * 7 1/6 = 7 1/6 * (3 2/7 + 2 5/7) =

= 7 1/6 * 6 = 43/6 * 6 = 43

3)

10 * 0,1 = 1

8 * 7/16 = 56/16 = 7/2 = 3 1/2 = 3,5