Subtracting 10

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• 10 - 10 = 0
• 11 - 10 = 1
• 12 - 10 = 2
• 13 - 10 = 3
• 14 - 10 = 4
• 15 - 10 = 5
• 16 - 10 = 6
• 17 - 10 = 7
• 18 - 10 = 8
• 19 - 10 = 9
• 20 - 10 = 10