номер 629. Найдите значение произведения: 1) 3/16×1/3×(-5 1/3); 2) (-2/19)×(-3/4)×(-9 1/2); 3) 7/20×(-3/17)×(-8 2/21); 4)(-13/25)×(-5 10/13)×2/3

Пошаговое объяснение:

1) = 3/16 * 1/3 * (-16/3) =

(-16/3 * 3/16) * 1/3 =

(-1/1 * 1/1) * 1/3 = -1 * 1/3 = -1/3

2) = -2/19 * (-3/4) * (-19/2) = (-2/19 * (-19/2) ) * (-3/4) =

(-1/1 * (-1/1) ) * (-3/4) = 1 * (-3/4) = -3/4

3) = 7/20 * (-3/17) * (-170/21) =

(-3/17 * (-170/21) ) * 7/20 =

(-1/1 * (-10/7) ) * 7/20 =

10/7 * 7/20 = 10/20 = 1/2

4) = (-13/25) * (-75/13) * 2/3 =

(-13/25 * (-75/13) ) * 2/3 =

(-1/1 * (-3/1) ) * 2/3 = 3/1 * 2/3 = 6/3 = 2