Solutions by everydaycalculation.com
1st number: 3 0/10, 2nd number: 4 0/10
3010 + 4010 is 71.
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Related: 60/10+40/10 30/10+80/10 30/20+40/10 30/10+40/20 90/10+40/10 30/10+40/30 30/50+40/10 30/10+40/50 30/70+40/10 30/10+40/70
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