Solutions by everydaycalculation.com
1824 + 2124 is 138.
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Related: 36/24+21/24 18/24+42/24 18/48+21/24 18/24+21/48 54/24+21/24 18/24+63/24 18/72+21/24 18/24+21/72 90/24+21/24
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