Subtraction with jump line..., 8, 9, Count subtraction with cross line.., 9 - 3 = 6, 9 - 6 = 3, How many are left duck..., 6, 12, How many are left chick..., 9, 5, Count subtraction with cross line.., 12 - 4 = 8, 12 - 8 = 4.

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