Solutions by everydaycalculation.com
1st number: 4/20, 2nd number: 1 12/20
420 - 3220 is -75.
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Related: 8/20-32/20 4/20-64/20 4/40-32/20 4/20-32/40 12/20-32/20 4/20-96/20 4/60-32/20 4/20-32/60 28/20-32/20
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