Solutions by everydaycalculation.com
1st number: 3/10, 2nd number: 4 0/10
310 + 4010 is 4310.
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Related: 6/10+40/10 3/10+80/10 3/20+40/10 3/10+40/20 9/10+40/10 3/30+40/10 3/10+40/30 15/10+40/10 3/50+40/10 3/10+40/50 21/10+40/10 3/70+40/10 3/10+40/70
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