Solutions by everydaycalculation.com
1st number: 18/30, 2nd number: 2 4/30
1830 - 6430 is -2315.
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Related: 36/30-64/30 18/60-64/30 18/30-64/60 54/30-64/30 18/90-64/30 18/30-64/90 90/30-64/30
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