Solutions by everydaycalculation.com
1830 - 530 is 1330.
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Related: 36/30-5/30 18/30-10/30 18/60-5/30 18/30-5/60 54/30-5/30 18/30-15/30 18/90-5/30 18/30-5/90 90/30-5/30 18/30-25/30 18/30-35/30
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