Ответ:

Пошаговое объяснение:

1) 4(1/4 - 1/2) = 4/4 - 4/2 = 1 - 2 = -1

3) 21(1/7 - 1/3 - 1) = 21/7 - 21/3 - 21 =

3 - 7 - 21 = -25

5) 18(1/9 - 1/2 - 1/3) = 18/9 - 18/2 - 18/3 = 2 - 9 - 6 = -13

2) (-1/7 + 1/14 - 1/42) * 42 =

-42/7 + 42/14 - 42/42 = -6 + 3 - 1 = -4

4) -12(1/3 - 1/6) = -12/3 + 12/6 = -4 + 2 = -2

6) (1/25 - 1/2 - 1/5) * (-1 00) =

-1 00/25 + 1 00/2 + 1 00/5 =

-4 + 50 + 20 = 66