6.35-4又4分之3
=6.35-4.75
=6.75-0.4-4.75
=6.75-4.75-0.4
=2-0.4
=1.6
1又20分之11-2.25
=1.55-2.25
=-0.7谢谢，但我有点看不懂，答案是多少？
6.35-4又4分之3+1又20分之11-2.25
=6.35-4.75+1.55-2.25
=6.35+1.55-(4.75+2.25)
=7.9-7
=0.9