1.20/11+5/9=180/99+55/99=235/99
8/11+2/9=72/99+22/99=1
235/99除以1等于235/99
2.(20/11+5/9)/(8/11+2/9)
=[(180+55)/99]/[(72+22)/99]
=235/99*99/94
=235/94
=2.5
3.(20/11+5/9)/(8/11+2/9)
=[(180+55)/99]/[(72+22)/99]
=235/99×99/94
=235/94
=2.5
1.20/11+5/9=180/99+55/99=235/99
8/11+2/9=72/99+22/99=1
235/99除以1等于235/99
2.(20/11+5/9)/(8/11+2/9)
=[(180+55)/99]/[(72+22)/99]
=235/99*99/94
=235/94
=2.5
3.(20/11+5/9)/(8/11+2/9)
=[(180+55)/99]/[(72+22)/99]
=235/99×99/94
=235/94
=2.5