Solutions by everydaycalculation.com
1st number: 12/20, 2nd number: 2 5/20
1220 + 4520 is 5720.
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Related: 24/20+45/20 12/20+90/20 12/40+45/20 12/20+45/40 36/20+45/20 12/60+45/20 12/20+45/60 60/20+45/20 84/20+45/20
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