Solutions by everydaycalculation.com
1242 - 512 is -1184.
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Related: 24/42-5/12 12/42-10/12 12/84-5/12 12/42-5/24 36/42-5/12 12/42-15/12 12/42-5/36 60/42-5/12 12/42-25/12 12/42-5/60 84/42-5/12 12/42-35/12 12/42-5/84
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