Adding 9

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