,第 3 课时 整十数加一位数及相应的减法,第 三 单元 认识100以内的数,(1)40是( )个十(2)45里面有( )个十和( )个一,4个十和5个一是( )(3)38里面有( )个十和( )个一,3个十和8个一是( ),2口算,1填空:, 63, 58, 94, 157, 89, 156, 146, 46,4,4,5,45,3,8,38,9,13,5,8,17,9,8,10,30 4,4 30,3430,34 4,34,34,4,30, 加 数, 加 数, 和, 被减数, 减 数, 差,6,46,6,40,46,46,40,6,46,6,40,63,63,3,60,59,59,50,9,4,37,72,50,78,78,8,70,68,4,78,78,8,39,47,58,2,60,8,5. 写出相邻的两个数。( ),68 ,( )( ),81 ,( )( ),99 ,( ),69,67,82,80,100,98,4,20,24,38,30,8,50,11,22,33,44,55,66,77,88,99,3,5,35,5,2,52,85,6,26,6,53,20,60,82,70,20,8,5,29,20,9,