>3 5> 5-1>
2< <4 1+0<
( )+( )=( )
① ;
② ;
③ ;
④ .
2+3= 2-2= 4-2= 2+0=
4-3= 3+2= 2+2= 5-2=
0+3= 5-3= 2-0= 3-2=
5-1= 3+1= 2-1= 2+1=