整十数加一位数 及相应的减法,说说数的组成:,_ 个十,_个一,合起来是_。,5,2,25,_ 个十,_个一,合起来是_。,3,6,63,20,+,5,=,25,加法,5,+,20,=,25,一、数的合与分:二、填空: 5个一是( ) 3个十和5个一是( ) 三、口算: 10+6= 3+10= 10+9=,35,16,13,19,5,25,5,60,58,1. 5个十和8个一合起来是( )。,2. 6个十和3个一合起来是( )。,3. 48里面有( )十和( )个一 。,4. 27里面有( )个一和( )个十 。,63,4,8,7,2,50,6,56,35,_,5,30,40,+,2,=,42,加数,加数,和,填空:()() ( )( ) ( )( ) ( )( ) ( )( ) ( )( ) ,42,-,2,=,40,被减数,减数,差,45,5,40,45,40,5,50,7,57,57,7,50,7,50,57,57,50,7,20+5=25,34-4=30,看图列式,20,8,28,28,8,20,8,20,28,28,20,8,填一填,39,47,58,填一填,2,60,8,有43个篮球,借走3个,还剩几个?,43 - 3 = 40 (个),