Solutions by everydaycalculation.com
1st number: 18/20, 2nd number: 1 16/20
1820 - 3620 is -910.
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Related: 36/20-36/20 18/20-72/20 18/40-36/20 18/20-36/40 54/20-36/20 18/60-36/20 18/20-36/60 90/20-36/20
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