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跳绳,城南小学,谷敏兰,一共有几个小朋友?,1,7,8,+,=,7,8,8,6,2,7,1,8,8,1,7,1,+,=,+,+,+,+,+,8,2,8,2,6,6,3,5,2,6,8,8,5,3,8,8,5,3,8,3,5,-,-,-,-,-,-,-,=,=,=,=,=,=,=,=,=,=,4,4,4,8,8,4,=,=,8,( )+( )=( ),0,7,6,3,4,3,2,7,8,0,填一填,8,8,7,4,照样子,画一画,填一填。,8,5,4 +(4)= 8,2,+,( ),=,5,3,7,3,+,( ),=,=,( ),7,4,6,1,+,6,5,3,5,8,5,3,8,8,3,5,5,8,3,=,=,-,-,练一练,7,1,8,8,7,1,1,7,8,8,1,7,? 棵,4,4,8,7,5,2,? 朵,7朵,板书设计,跳绳,1+7=8 2+6=8 3+5=8 4+4=87+1=8 6+2=8 5+3=8 8-1=7 8-2=6 8-3=5 8-4=48-7=1 8-6=2 8-5=3,8的加减法,