Solutions by everydaycalculation.com
1st number: 3/10, 2nd number: 3 2/10
310 + 3210 is 72.
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Related: 6/10+32/10 3/10+64/10 3/20+32/10 3/10+32/20 9/10+32/10 3/10+96/10 3/30+32/10 3/10+32/30 15/10+32/10 3/50+32/10 3/10+32/50 21/10+32/10 3/70+32/10 3/10+32/70
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