1,连加连减,2,口算:,2+4=,6,6+2=,7-4=,6-3=,3-3=,7-2=,6+3=,3-0=,5-4=,3+3=,3,0,3,5,9,3,6,1,8,3,4,5,2,1,7,8,5,3,4,2,7,9,6,5,+,1,+,1,=,7,6,7,4 + 3 + ( ) = ( ),?,1,8,8,10,9,8,10,8,2,11,12,8,2,2,6,4,13,8,2,4,4,2,14,7,-,1,-,2,=,4,6,15,10 - 5 - ( ) = ( ),3,2,16,10 - 3 - 3 =,4,17,先摆一摆,再填数,?,4,3,10,5,1,8,3,2,( ),( ),( ),( ),18,3+4+1= 4+3+2=2+2+4= 5+0+3=7+2+1= 6+4+0=,7,8,4,8,7,5,9,10,9,8,10,10,19,比一比,看谁算得又对又快,10,0,8,2,1,9,10,6,9,3,20,总结: 通过对本节课的学习,同学们学会计算连加、连减算式了吗?,21,作业: 数学书第66页第5题,