Solutions by everydaycalculation.com
1st number: 5 4/10, 2nd number: 2 8/10
5410 + 2810 is 415.
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Related: 54/10+56/10 54/20+28/10 54/10+28/20 54/10+84/10 54/30+28/10 54/10+28/30 54/50+28/10 54/10+28/50 54/70+28/10 54/10+28/70
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