17 + 23 ◻ 18 + 25
58 – 12 ◻ 76 – 22
125 + 33 ◻ 300 – 83
125 – 38 ◻ 125 – 42
338 + 24 ◻ 150 + 79
1 500 – 315 ◻ 1 005 + 50
35 + 70 ◻ 95 + 10
37 – 17 ◻ 13 + 7
2 000 – 1 000 ◻ 897 + 103