Вычислите используя переместительное и сочетательное свойства умножения
1) ( -4/5) * (-3/8) * (-5/12) =
2) ( -9/10) * 5/6 * ( -2/3 ) =
3)( - 7/8) * ( -5/6) * (- 24/25) =
4) ( -25/44) * 63/100 * 22/45 * ( -2 2/7 ) =

Пошаговое объяснение:

1)

(-4/5) × (-3/8) × (-5/12) = ((-4/5) × (-3/8)) × (-5/12) = ((-1/5) × (-3/2)) × (-5/12) =

= (-1/5) × ((-3/2) × (-5/12)) = (-1/5) × (-1/2) × (-5/4) = ((-1/5) × (-5/4)) × (-1/2) =

= (-1/1) × (-1/4) × (-1/2) = -1/8

2)

(-9/10) × 5/6 × (-2/3) = ((-9/10) × 5/6) × (-2/3) = (-3/2) × (1/2 × (-2/3)) =

= ((-3/2) × (-1/3)) × 1/1 = (-1/2) × (-1/1) × 1 = 1/2

3)

(-7/8) × (-5/6) × (-24/25) = ((-7/8) × (-24/25)) × (-5/6) = (-7/1) × ((-3/25) × (-5/6)) =

= (-7) × (-1/5) × (-1/2) = (-7/10) = -0,7

4)

(-35/44) × 63/100 × 22/45 × (-2целых 2/7) = ((-35/44) × 22/45) × (63/100) × (-16/7) =

= (-7/2) × 1/9 × 9/25 × (-4/1) = ((-7/2) × (-4)) × (1/9 × 9/25) = (-7) × (-2) × 1 × 1/25 =

= 14 × 1/25 = 14/25