5内数的分与合 姓名: 计时: 54 ( )42 ( )43 ( )54 ( ) ( )3 2( )3 132 ( ) ( )1 152 ( )41 ( )31 ( ) ( )4 1 ( )2 353 ( )42 ( )2+1= 1+3= 1+1= 4-1= 5-3= 4-3=3+2= 2+2= 3+1= 5-4= 4-2= 5-2=4+1= 2+3= 1+4= 3-2= 2-1= 4-3=