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Talking About Math. 3. 6. 9. 12. 15. 18. 21. 27. 30. 33. 36. 7. 14. 21. 28. 35. 42. 49. 56. 63. 70. 77. 84. TRUE OR FALSE?. A + 0 = A. A + B = B+A. SOLVE. 7 + 10 = +11. 7 + 10 = +9. 70 + 100 = +99. SOLVE. 80 = +50. 80 = +35.
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