Solutions by everydaycalculation.com
112 + 412 is 512.
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Related: 2/12+4/12 1/12+8/12 1/24+4/12 1/12+4/24 3/12+4/12 1/36+4/12 1/12+4/36 5/12+4/12 1/12+20/12 1/60+4/12 1/12+4/60 7/12+4/12 1/12+28/12 1/84+4/12 1/12+4/84
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