30 + 15 – 6 = 45 – 6 = 39
60 – 7 + 18 = 53 + 18 = 71
18 : 3 + 4 × 3 = 6 + 12 = 18
2 × 8 + 21 : 7 = 16 + 3 = 19
12 + 6 : 2 – 7 × 2 = 12 + 3 – 14 = 15 – 14 = 1
37 + 9 – 6 : 2 × 3 = 37 + 9 – 3 × 3 = 37 + 9 – 9 = 46 – 9 = 37
70 : (3 + 7) + 24 = 70 : 10 + 24 = 7 + 24 = 31
60 : 6 × 3 – 18 = 10 × 3 – 18 = 30 – 18 = 12
100 – (24 – 18) × 3 = 100 – 6 × 3 = 100 – 18 = 82
100 – (72 – 67) × 2 = 100 – 5 × 2 = 100 – 10 = 90