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跳绳,+ =,6,2,8,一共有多少人？,(人),3,+,5,=,8,5,=,3,-,8,5+3=8,8-5=3,8,8,5,1,2,5,4,6,1,0,7,4,0,3,2,7,8,6,3,+ = 9,8,1,1,9 =,8,+ = 9,7,2,2,9 =,7,+ = 9,6,3,3,9 =,6,+ = 9,4,5,4,9 =,5,+ = 9,5,4,5,9 =,4,填一填,8,9,6,4,3,5,8,5,3,8,3,3,8,8,5,5,7,2,9,9,7,2,2,7,9,9,2,7,? 棵,4,5,9,5,2,7,? 朵,