小二甲班鄭奕杰 1. 72-8 = 64+10-8 = 63+1 = 64 2. 54-5 = = 49+10-5 = 48+1 = 49 3. 52-8 = 44+10-8 = 43+1 = 44 4. 72-3 = = 69+10-3 = 68+1 = 69) 5. 73-9 = 64+10-9 = 63+1 = 64 6. 16-9 = 7+9 = 6+1 = 7 7. 83-4 = = 79+10-4 = = 78+1 = 79 8. 42-9 = 33+10-9 = 32+1 = 33 9. 32-6 = 26+10-6 = 25+1 = 26 10. 11-5 === 5+1 = 6 11. 62-8 = = 54+10-8 = 53+1 = 54 12. 86-9 = 77+10-9 = 76+1 = 77 13. 82-7 = 75+10-7= 74+1 = 75 14. 56-9 = 47+10-9 = 46+1= 47 15. 41-4 = 37+10-4 = = 36+1 = 37 16. 72-5 = = 67+10-5 = 66+1 = 67 17. 35-7 = = 28+10-7 = 27+1 = 28 18. 62-8 = = 54+10-8 = 53+1 = 54 19. 65-8 = = 57+10-8 = 56+1 = 57 20. 42-7 = 35+10-7 = 34+1 = 35 21. 33-9 = 24+10-9 = 23+1 = 24 22. 84-9 = 75+10-9 = 74+1 = 75 23. 53-9 = 44+10-9 = 43+1 = 44 24. 57-9 = 48+10-9 = 47+1 = 48 |
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