Solutions by everydaycalculation.com
1st number: 18/30, 2nd number: 1 20/30
1830 - 5030 is -1615.
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Related: 36/30-50/30 18/60-50/30 18/30-50/60 54/30-50/30 18/90-50/30 18/30-50/90 90/30-50/30
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