Question

ПРОШУ ВАС! С ОБЪСНЕИЕМ!

Answer 1

Пошаговое объяснение:

№1

1) -4/15 + 7/12 = -16/60 + 35/60 = 19/60

2) 19/60 : (-38/45) = 19/60 * (-45/38) = 1/4 * (-3/2) = -3/8

№2

1) 11/16 - (-17/24) = 11/16 + 17/24 = 33/48 + 34/48 = 67/48

2) 67/48 : (-5 7/12) = 67/48 : (-67/12) = 67/48 * (-12/67) = 1/4 * (-1/1) = -1/4

№3

1) -11/18 + 33/45 = -55/90 + 66/90 = 11/90

2) 35/81 - 19/27 = 35/81 - 57/81 = -22/81

3) 11/90 : (-22/81) = 11/90 * (-81/22) = 1/10 * (-9/2) = -9/20

№4

1) -5,4 : 9/25 = -54/10 * 25/9 = -6/2 * 5/1 = -30/2 = -15

2) -11 2/9 - (-15) = -11 2/9 + 15 = -11 2/9 + 14 9/9 = 3 7/9

3) 2 1/4 * 3 7/9 = 9/4 * 34/9 = 1/2 * 17/1 = 17/2 = 8 1/2

4) -4 1/7 + 8 1/2 = -4 2/14 + 8 7/14 = 4 5/14