Solutions by everydaycalculation.com
1st number: 8/20, 2nd number: 1 10/20
820 - 3020 is -1110.
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Related: 16/20-30/20 8/20-60/20 8/40-30/20 8/20-30/40 24/20-30/20 8/20-90/20 8/60-30/20 8/20-30/60 40/20-30/20 56/20-30/20
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