Solutions by everydaycalculation.com
1st number: 1 15/20, 2nd number: 3 2/10
3520 - 3210 is -2920.
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Related: 70/20-32/10 35/20-64/10 35/40-32/10 35/20-32/20 35/20-96/10 35/60-32/10 35/20-32/30 35/20-32/50 35/20-32/70
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