小二甲班鄭奕杰 1. 36-9 = 26+10-9 = 28-1 = 27 2. 73-9 = 63+10-9 = 65-1 = 64 3. 86-9 = 76+10-9 = 78-1 = 77 4. 14-9 = 4+10-9 = 6-1= 5 5. 74-7 = 64+10-7 = =68-1 = 67 6. 83-4 = 73+10-4 = 80-1 = 79 7. 92-5 = 82+10-5 = 88-1 = 87 8. 44-7 = 34+10-7 = 38-1 = 37 9. 35-8 = 25+10-8 = 28-1 = 27 10. 92-5 = 82+10-5 = 88-1 = 87 11. 13-7 = 3+10-7 = 7-1 = 6 12. 84-9 = 74+10-9 = 76-1 = 75 13. 62-3 = 52+10-3 = = 60-1 = 59 14. 56-7 = 46+10-7 = 50-1 = 49 15. 24-9 = 14+10-9 = 16-1 = 15 16. 96-7 = 86+10-7 = 90-1 = 89 17. 32-6 = 22+10-6 = 27-1 = 26 18. 62-8 = 52+10-8 = 55-1 = 54 19. 34-7 = 24+10-7 = 28-1 = 27 20. 66-9 = 56+10-9 = 58-1 = 57 21. 81-4 = 71+10-4 = 78-1 = 77 22. 44-9 = 34+10-9 =36-1 = 35 23. 48-9 = 38+10-9 = 40-1 = = 39 24. 63-4 = 53+10-4 = 60-1 = 59 |
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