а) - 4•15•25 = - (4•25)•15 = - 100•15 = - 1500;
b) -3/7 • (-22) • 2 1/3 = + (3/7•7/3) • 22 = 1•22 = 22.
а) - 4•15•25 = - (4•25)•15 = - 100•15 = - 1500;
b) -3/7 • (-22) • 2 1/3 = + (3/7•7/3) • 22 = 1•22 = 22.