Solutions by everydaycalculation.com
212 - 412 is -16.
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Related: 4/12-4/12 2/12-8/12 2/24-4/12 2/12-4/24 6/12-4/12 2/36-4/12 2/12-4/36 10/12-4/12 2/12-20/12 2/60-4/12 2/12-4/60 14/12-4/12 2/12-28/12 2/84-4/12 2/12-4/84
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