True: 4 + 3 = 7, 8 + 2 = 10, 6 + 6 = 12, 12 + 5 = 17, 10 + 9 = 19, 5 + 5 = 10, 4 + 15 = 19, 17 + 1 = 18, 13 + 5 = 18, 12 + 4 = 16, False: 4 + 3 = 8, 8 + 2 = 11, 6 + 6 = 10, 12 + 5 = 16, 10 + 9 = 20, 5 + 5 = 11, 4 + 15 = 18, 17 + 1 = 16, 13 + 5 = 17, 12 + 4 = 15,

ADDITION WITHIN 20 PART 3

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