Solutions by everydaycalculation.com
1st number: 4 12/18, 2nd number: 3 16/18
8418 - 7018 is 79.
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Related: 84/36-70/18 84/18-70/36 84/54-70/18 84/18-70/54 84/90-70/18 84/18-70/90
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