Solutions by everydaycalculation.com
1st number: 1 4/10, 2nd number: 12/20
1410 + 1220 is 21.
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Related: 28/10+12/20 14/10+24/20 14/20+12/20 14/10+12/40 42/10+12/20 14/10+36/20 14/30+12/20 14/10+12/60 70/10+12/20 14/10+60/20 14/50+12/20 98/10+12/20 14/10+84/20 14/70+12/20
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