Solutions by everydaycalculation.com
1630 - 130 is 12.
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Related: 32/30-1/30 16/30-2/30 16/60-1/30 16/30-1/60 48/30-1/30 16/30-3/30 16/90-1/30 16/30-1/90 80/30-1/30 16/30-5/30 16/30-7/30
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