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In grade one, Xiaohong played seven times, Xiaoli played eight times and Xiao Fang played nine times. What questions can I ask in addition calculation?
1) How many did Xiaohong and Xiaoli mention? 7+8= 15.

2) How many did Xiao Hong and Xiao Fang kick? 7+9= 16.

3) How many did Xiaoli and Xiao Fang fight? 8=9= 17.

4) How many times did three people kick together? 7+8+9=24.

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