Пошаговое объяснение:
1) 18*(1/3 - 1/9) = 18/3 - 18/9 = 6 - 2 = 4
Другой
18*(3/9 - 1/9) = 18*2/9 = 2*18/9 = 2*2 = 4
2) (2 - 3/4 - 4/5)*20 = 2*20 - 3*20/4 - 4*20/5 = 40 - 15 - 16 = 9
(40/20 - 15/20 - 16/20)*20 = (40 - 15 - 16)/20*20 = 9/20*20 = 9
Пошаговое объяснение:
1) 18*(1/3 - 1/9) = 18/3 - 18/9 = 6 - 2 = 4
Другой
18*(3/9 - 1/9) = 18*2/9 = 2*18/9 = 2*2 = 4
2) (2 - 3/4 - 4/5)*20 = 2*20 - 3*20/4 - 4*20/5 = 40 - 15 - 16 = 9
Другой
(40/20 - 15/20 - 16/20)*20 = (40 - 15 - 16)/20*20 = 9/20*20 = 9