Solutions by everydaycalculation.com
1242 - 442 is 421.
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Related: 24/42-4/42 12/42-8/42 12/84-4/42 12/42-4/84 36/42-4/42 12/42-12/42 60/42-4/42 12/42-20/42 84/42-4/42 12/42-28/42
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