Correct: half of 10 = 5, half of 20 =10, half of 18 = 9, half of 2 =1, half of 8 = 4, half of 12 = 6, half of 4 = 2, half of 14 = 7, Incorrect: half of 20 = 12, half of 2 = 0, half of 6 = 4, half of 8 = 6, half of 18 = 8, half of 10 = 4, half of 14 = 6,

Halving within 20

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