4+3+1, 8, 5+2+3, 10, 2+2+1, 5, 3+2+1, 6, 4+4+1, 9, 3+2+2, 7, 1+1+1, 3, 3+8+10, 21, 5+4+6, 15, 7+3+3, 13, 8+2+2, 12, 10+2+2, 14, 2+1+1, 4, 10+3+3, 16, 10+5+2, 17, 10+4+4, 18, 10+5+4, 19, 10+5+5, 20

Adding 3 Single Digit Numbers

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