Solutions by everydaycalculation.com
1st number: 18/30, 2nd number: 1 10/30
1830 - 4030 is -1115.
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Related: 36/30-40/30 18/30-80/30 18/60-40/30 18/30-40/60 54/30-40/30 18/90-40/30 18/30-40/90 90/30-40/30
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