Solutions by everydaycalculation.com
820 - 112 is 1960.
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Related: 16/20-1/12 8/20-2/12 8/40-1/12 8/20-1/24 24/20-1/12 8/20-3/12 8/60-1/12 8/20-1/36 40/20-1/12 8/20-5/12 8/20-1/60 56/20-1/12 8/20-7/12 8/20-1/84
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