Solutions by everydaycalculation.com
89 - 810 is 445.
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Related: 16/9-8/10 8/9-16/10 8/18-8/10 8/9-8/20 24/9-8/10 8/9-24/10 8/27-8/10 8/9-8/30 40/9-8/10 8/9-40/10 8/45-8/10 8/9-8/50 56/9-8/10 8/9-56/10 8/63-8/10 8/9-8/70
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