乘车,口算8+2=,10,8-7=,1,0+9=,9,2+5=,7,10-2=,8,4+3=,7,?,( ) + ( ) = ( ),3,2,5,8 只,？,8 - 3 = 5,乘车,起点,三家店,七里站,九棵树,起点,三家店,七里站,九棵树,起点,三家店,七里站,九棵树,2 + 3 + 2 =,5,7,5,+,2,+,1,=,8,7,？,8,-,1,4,-,=,7,3,8,1,4,9 只,？,9,4,-,-,2,=,3,5,想一想,9 只,？,9,4,-,-,2,=,3,5,9,+,1,-,5,=,10,5,9,1,5,4 + 3 - 1 =,7,6,？,试,一,试,5 2 3 ,7 2 3 ,4 1 5 ,8 3 4 ,7,2,5,10,5,4,9,5,练一练,1.,2,3,4,一共有几个,一共有多少人？,3,3,3,2,4,9,3,6,3,3,3,6,+,+,+,+,=,=,9,练一练,2说一说，算一算,8,2,3,3,3,2,8,-,-,=,比一比,看谁算得又对又快,10,0,8,2,1,9,10,6,9,3,作业,课本第47页,第5题第6题第7题,谢谢,
