Solutions by everydaycalculation.com
1st number: 18/20, 2nd number: 1 5/20
1820 + 2520 is 4320.
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Related: 36/20+25/20 18/20+50/20 18/40+25/20 18/20+25/40 54/20+25/20 18/20+75/20 18/60+25/20 18/20+25/60 90/20+25/20
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