Пошаговое объяснение:
1) 3/16 * (-5 1/3) * 1/3 =
3/16 * (-16/3) * 1/3 =
-1 * 1/3 = - 1/3
2) -2/19 * (-9 1/2) * (-3/4) =
-2/19 * (-19/2) * (-3/4) =
1 * (-3/4) = -3/4
3) -3/17 * (-8 2/21) * 7/20 =
-3/17 * (-170/21) * 7/20 =
10/7 * 7/20 = 10/20 = 1/2
4) -13/25 * (-5 10/13) * 2/3 =
-13/25 * (-75/13) * 2/3 =
75/25 * 2/3 = 3 * 2/3 = 6/3 = 2
