|
 | | |  | | | | |  | | | | |  | | 1. | | 670 - 180 = | 490 |  | 2. | | 640 - 130 = | 510 |  | 3. | | 80 - 20 = | 60 |  | | |  | | | | |  | | | | |  | | 4. | | 520 - 30 = | 490 |  | 5. | | 550 - 120 = | 430 |  | 6. | | 670 - 80 = | 590 |  | | |  | | | | |  | | | | |  | | 7. | | 310 - 190 = | 120 |  | 8. | | 580 - 510 = | 70 |  | 9. | | 430 - 120 = | 310 |  | | |  | | | | |  | | | | |  | | 10. | | 630 - 360 = | 270 |  | 11. | | 360 - 110 = | 250 |  | 12. | | 660 - 230 = | 430 |  | | |  | | | | |  | | | | |  | | 13. | | 420 - 80 = | 340 |  | 14. | | 170 - 70 = | 100 |  | 15. | | 540 - 140 = | 400 |
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