19又33/56+0.875

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19又33/56+0.87519又33/56+0.87519又33/56+0.87519又33/56+0.875=19又33/56+7/8=19又33/56+49/56=20又13/28

19又33/56+0.875
19又33/56+0.875

19又33/56+0.875
19又33/56+0.875
=19又33/56+7/8
=19又33/56+49/56
=20又13/28