522
1. 13 14
28
2. 1 2
12
3. 37 1
32
4. 1 9
15
5. 20 8
16
6. 1 24
42
7. 53 24
64
8. 60 20
40
523
1. 5 60 - 1 50 = 4 10
40 40 40
2. 56 78 - 46 60 = 10 18
70 70 70
3. 32 90 - 12 70 = 20 20
50 50 50
4. 42 89 - 40 87 = 2 2
43 43 43
5. 8 71 - 11 = 8 60
8 8 8