30 - 4 - 26, 55 - 2 - 53, 75 - 20 - 55, 10 - 10 - 0, 12 - 4 - 8, 45 - 3 - 42, 25 - 12 - 13, 17 - 9 - 8, 45 - 20 - 25, 9 - 2 - 7,

Subtracting two digit and one digit numbers

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