Ответ:

Пошаговое объяснение:

б) -25 * 17/19 *(-0,4) * (-1 2/17) = (-25 * (-0,4)) * ((17/19 * ( -1 2/17) =

= 10 * (17/19 * (- 19/17) = 10 * (-1) = - 10

Verified answer

Пошаговое объяснение:

Б

-25 * 17/19 * (-0,4) * (-1 2/17) =

(-25 * (-0,4)) * (17/19 * (-1 2/17)) =

10 * (17/19 * (-19/17)) = 10 * (-1) = -10

№2

1) -4,8 : 4/15 = -48/10 * 15/4 = -12/2 * 3/1 = -36/2 = -18

2) -15 3/7 - (-18) = -15 3/7 + 18 = -15 3/7 + 17 7/7 = 2 4/7

3) 2 1/3 * 2 4/7 = 7/3 * 18/7 = 1/3 * 6/1 = 6/3 = 2

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