Solutions by everydaycalculation.com
1042 - 1842 is -421.
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Related: 20/42-18/42 10/42-36/42 10/84-18/42 10/42-18/84 30/42-18/42 10/42-54/42 50/42-18/42 10/42-90/42 70/42-18/42
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