20 - 9 = ?, 11, 3, 2, 20 - 5 = ?, 5, 15, 11, 20 - 10 = ?, 5, 10, 4, 20 - 16 = ?, 4, 8, 9, 20 - 7 = ?, 6, 13, 5

Subtraction with 20

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