Solutions by everydaycalculation.com
1st number: 4/10, 2nd number: 1 15/20
410 - 3520 is -2720.
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Related: 8/10-35/20 4/10-70/20 4/20-35/20 4/10-35/40 12/10-35/20 4/30-35/20 4/10-35/60 20/10-35/20 4/50-35/20 28/10-35/20 4/70-35/20
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