85 21/90 - 83 25/90 te kreski to ułami
85 i 21/90 - 83 i 25/90 = 84 i 101/90 - 83 i 25/90 = 1 i 76/90 = 1 i 38/45
85i21/90-83i25/90=84i111/90-83i25/90=1i86/90=1i43/45
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85 i 21/90 - 83 i 25/90 = 84 i 101/90 - 83 i 25/90 = 1 i 76/90 = 1 i 38/45
85i21/90-83i25/90=84i111/90-83i25/90=1i86/90=1i43/45