Solutions by everydaycalculation.com
1st number: 1 1/20, 2nd number: 3 10/20
2120 - 7020 is -4920.
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Related: 42/20-70/20 21/40-70/20 21/20-70/40 63/20-70/20 21/60-70/20 21/20-70/60
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