Solutions by everydaycalculation.com
1st number: 2 10/20, 2nd number: 1 10/20
5020 - 3020 is 11.
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Related: 50/20-60/20 50/40-30/20 50/20-30/40 50/20-90/20 50/60-30/20 50/20-30/60
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