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1. | 5 0 + 3 0 5 0 3 0 | 5 0 + 3 0 = 8 0 5 . + 3 . = 8 . 8 . = 80 | ; . | |
2. | 2 4 + 3 | 2 4 + 3 = 27 4 + 3 = 7 20 + 7 = 27 | ; ; . | |
3. | 6 8 + 2 | 6 8 + 2 = 70 8 + 2 = 10 60 + 10 = 70 | ; ; . | |
4. | 4 8 3 | 48 3 = 45 8 3 = 5 40 + 5 = 45 | ; ; . | |
5. | 50 8 | 50 8 = 42 50 = 40 + 10 10 8 = 2 40 + 2 = 42 | ; ; . | |
6. | 3 0 + 1 5 4 3 + 2 0 | 3 0 + 1 5 = 45 15 = 10 + 5 30 + 10 = 40 40 + 4 = 45 | ; . | |
7. | 5 4 2 0 | 5 4 2 0 = 34 50 20 = 30 30 + 4 = 34 | ; . | |
8. | 58 + 3 | 58 + 3 = 61 58 + 2 = 60 60 + 1 = 61 | ; ; ; . | |
9. | 56 7 | 56 7 = 49 56 6 = 48 50 1 = 49 | ; . | |
10. | 3 4 + 1 3 4 6 + 2 4 | 3 4 + 1 3 = 47 30 + 10 = 40 4 + 3 = 7 40 + 7 = 47 | , , | ; ; . |
11. | 98 42 | 9 8 4 2 = 56 90 40 = 50 8 2 = 6 50 + 6 = 56 | , , | ; ; . |
12. | 60 23 | 60 23 = 37 60 20 = 40 40 3 = 37 | , | ; ; . |
13. | 4 7 + 3 5 | ) 47 + 35 = 82 40 + 30 = 70 7 + 5 = 12 70 + 12 = 82 )47 + 30 = 77 77 + 5 = 82 ) 47 + 3 = 50 35 = 3 + 32 50 + 32 = 83 | , , | ; ; . |
14. | 52 27 | ) 52 27 = 25 52 20 = 32 32 7 = 25 )52 27 = 25 27 = 22 + 5 52 22 = 30 30 5 = 25 | ; . |
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