6. 60 - 18, 44 + 26, 47 + 16, 54 - 19, 90 - 25, 50 + 38, 100 - 88, 40 - 26

60 - 18 = 42
44 + 26 = 70
47 + 16 = 63
54 - 19 = 35
90 - 25 = 65
50 + 38 = 88
100 - 88 = 12
40 - 26 = 14