Помогите по действиям! (2,5-2 1/3) * (-5 1/7) + 1 1/3: (-5,6) =

Question

Математика

Гания

11 мая, 11:00

Помогите по действиям! (2,5-2 1/3) * (-5 1/7) + 1 1/3: (-5,6) =

+2

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Елладия · Answer 1

2,5-2 1/3=2 1/2-2 1/3=2 3/6-2 2/6=1/6

1/6 * (-5 1/7) = 1/6 * (-36/7) = - 6/7

1 1/3: (-5,6) = 1 1/3: (-5 3/5) = 4/3 * (-5/28) =

-5/18

-6/7 + (-5/18) = - 108/126-35/126=-143/126

=-1 17/126

Пергий · Answer 2

(2,5 - 2 1/3) * (-5 1/7) + 1 1/3 : (-5,6) = - 1 43/84

1) 2 1/2 - 2 1/3 = 5/2 - 7/3 = 15/6 - 14/6 = 1/6

2) 1/6 * ( - 5 1/7) = 1/6 * ( - 36/7) = - 6/7

3) 11/3 : (-5 3/5) = 11/3 : (-28/5) = 11/3 * ( - 5/28) = - 55/84

4) - 6/7 + (-55/84) = - 72/84 - 55/84 = - 127/84 = - 1 43/84