▪а) 3,72 + 2/5 = 3,72 + 0,4 = 4,12
▪б) 1/3 + 0,3 = 1/3 + 3/10 = 10/30 + 9/30 = 19/30
▪в) 0,6 - 4/9 = 3/5 - 4/9 = 27/45 - 20/45 = 7/45
▪г) 3/5 - 0,76 = 3/5 - 19/25 = 15/25 - 19/25 = -4/25 = -0,16
▪д) -2,9 + (-1/4) = -2 9/10 - 1/4 = -2 18/20 - 5/20 = -2 23/20 = -3 целых 3/20 = -3,15
▪е) -1/6 - 0,5 = -1/6 - 1/2 = -1/6 - 3/6 = -4/6 = -2/3
▪ж) -3/7 + 0,5 = -3/7 + 1/2 = -6/14 + 7/14 = 1/14
▪з) 3/20 - 0,95 = 3/20 - 19/20 = -16/20 = -4/5 = -0,8