Solutions by everydaycalculation.com
1st number: 10 1/2, 2nd number: 10 4/5
212 - 545 is -310.
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Related: 42/2-54/5 21/4-54/5 21/2-54/10 63/2-54/5 21/6-54/5 21/2-54/15 21/10-54/5 21/2-54/25 21/14-54/5 21/2-54/35
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