Question

ПОМОГИТЕ ПОЖАЛУЙСТА ДАМ 97 БАЛЛОВ

Answer 1

Ответ:

Пошаговое объяснение:

1.

А) 14/25 – 7/15 = 14*3/25*3 – 7*5/15*5 = 42/75 – 35/75 = 7/75

Б) -4/9 – 2/15 = -4*5/9*5 – 2*3/15*3 = - 20/45 – 6/45 = -26/45

В) -3/7 * 14/27 = - 2/9

Г) 2/17 : (-3/34) = 2/17 * (-34/3) = - 2 * 2/3 = -4/3 = - 1  1/3

2.

7/9 * (-3/5) – 3/10 : (-4/5) = - 7/15 + 3/10 * 5/4 = -7/15 + 3/8 = -7*8/15*8 + 3*15/8*15 =  

= -56/120 + 45/120 = - 11/120

3.

24/25 * (-15/17 – 2/17) = 24/25 * (-1) = - 24/25

3/7 * ( 8/11 – 8/11 + 14/15) = 3/7  * 14/15 = 2/5