Question

Найдите значение выражения (8 1/42-12 4/21)-(5 1/42-3 3/7);2)-19 7/16 - (25 5/8-28 1/2)-3/4

Answer 1

Пошаговое объяснение:

№1

1) 8 1/42 - 12 4/21 = 8 1/42 - 12 8/42 = -4 7/42 = -4 1/6

2) 5 1/42 - 3 3/7 = 4 43/42 - 3 18/42 = 1 25/42

3) -4 1/6 - 1 25/42 = = -5 26/42 = -5 13/21

№2

1) 25 5/8 - 28 1/2 = 25 5/8 - 28 4/8 = 25 5/8 - 27 12/8 = -2 7/8

2) -19 7/16 - (-2 7/8) = -19 7/16 + 2 7/8 = -18 23/16 + 2 14/16 = -16 9/16

3) -16 9/16 - 3/4 = -16 9/16 - 9/16 = -16 18/16 = -17 2/16 = -17 1/8