351 Расставь скобки, чтобы равенства стали верными. 75:5+10-2 = 50 75:5+10-2 = 3 75:5+10-2 = 10 15-40-40:4:2 = 225 15-40-40:4:2 = 0 15-40-40:4:2 = 580

1) (75:5) + 10 - 2 = 15 + 10 - 2 = 23. (75:5+10)-2 = 25-2=23. 75:(5+10)-2 = 75:15-2 = 5-2=3. 75:5+(10-2) = 15+8=23.
2) 15 - (40 - (40:4:2)) = 15 - (40 - 5) = 15 - 35 = -20. (15-40)-(40:4:2) = -25-5 = -30. 15 - 40 - (40:4):2 = 15-40-10:2 = 15-40-5 = -30. 15 - (40 - 40:4:2) = 15 - (40 - 5) = 15 - 35 = -20.