1: 9-8, 8-7, 7-6, 6-5, 10-9, 2: 11-9, 10-8, 9-7, 8-6, 7-5, 3: 12-9, 11-8, 10-7, 9-6, 8-5, 4: 13-9, 12-8, 11-7, 10-6, 9-5,

Subtraction Differences 1-4

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