Ответ:

Пошаговое объяснение:

1)

(-5/12 - 3/4) : 2 1/3 + 5 1/3 * 0,75 = 3 1/2

1) -5/12 - 3/4 = -5/12 - 9/12 = -14/12 = -7/6 = -1 1/6

2) -7/6 : 2 1/3 = -7/6 * 3/7 = -1/2

3) 5 1/3 * 0,75 = 16/3 * 3/4 = 4

4) -1/2 +4 = 3 1/2

2)

(-2,5 - 1 5/6) : 1 4/9 - 3 5/9 * (-2 1/4) = 5

1) - 2,5 - 1 5/6 = - (25/10 + 11/6) = - (75/30 + 55/30) = - 130/30 = - 13/3

2) - 13/3 : 1 4/9 = - 13/3 : 13/9 = - 13/3 * 9/13 = - 9/3 = - 3

3) 3 5/9 * (-2 1/4) = 32/9 * (-9/4) = - 32/4 = - 8

4) - 3 - (-8) = - 3 + 8 = 8 - 3 = 5

3)

(-3,8 + 2 1/3) * (- 1 7/8) + 4 1/6 : (- 1 2/3) = 1/4

1) -3,8 + 2 1/3 = - 38/10 + 7/3 = - 114/30 + 70/30 = - 44/30 = - 22/15

2) -22/15 * (- 1 7/8) = - 22/15 * (- 15/8) = 22/8 = 2 6/8 = 2 3/4

3) 4 1/6 : ( - 1 2/3) = 25/6 : (-5/3) = 25/6 * (- 3/5) = - 5/2 = -2 1/2

4) 2 3/4 - 2 1/2 = 2 3/4 - 2 2/4 = 1/4

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