1) -2•(54-129) = -2•(-75) = 1502) (6/5-3/4)•2/3 = (24/20-15/20)•2/3 = (9/20)•2/3 = 18/60 = 3/103) 1,54-0,5•1,3 = 1,54 - 0,65 = 0,89
1) -2•(54-129) = -2•(-75) = 150
2) (6/5-3/4)•2/3 = (24/20-15/20)•2/3 = (9/20)•2/3 = 18/60 = 3/10
3) 1,54-0,5•1,3 = 1,54 - 0,65 = 0,89