Найдите произведение,используя свойства умножения:
а)(-2/3)*(-5/14)*(-3/4)*7/10
б)(2 целых 1/3)*(-8 целых 2/7)*3*(-7)
в)(-0.2)*(-0.5)*2/3*(-3/2)

а) (-2/3)*(-5/14)*(-3/4)*(7/10) = (-5/14)*(7/10)*(-2/3)*(-3/4) = (-1/4)*(1/2) = -1/8

б) (2 1/3)*(-8 2/7)*3*(-7) = (7/3)*3*(- 58/7)*(-7) = 7 * 58 = 406

в) (-0.2)*(-0.5)*2/3*(-3/2) = (-1/5)*(-1/2)*(-1) = -1/10 = -0.1