Solutions by everydaycalculation.com
1028 - 1828 is -27.
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Related: 20/28-18/28 10/28-36/28 10/56-18/28 10/28-18/56 30/28-18/28 10/28-54/28 10/84-18/28 10/28-18/84 50/28-18/28 10/28-90/28 70/28-18/28
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