Solutions by everydaycalculation.com
1st number: 3/10, 2nd number: 6 4/10
310 + 6410 is 6710.
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Related: 6/10+64/10 3/20+64/10 3/10+64/20 9/10+64/10 3/30+64/10 3/10+64/30 15/10+64/10 3/50+64/10 3/10+64/50 21/10+64/10 3/70+64/10 3/10+64/70
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