兜兜算加法

兜兜学会了简单的加法。有一次兜兜说他吃饭先吃了三口,又吃了四口。我就接着问:“那你一共吃了几口?”兜兜不作声,在屋子里转了两圈,停在镜子前面不走了,盯着镜子里的自己看,我看见他的手藏在身后手指在动,那是他的计算器。只见兜兜把手举起来一看,大声说:“七口!”
兜兜开始对数字敏感了。有一天他指着墙上的挂钟问:“长针指着3,短针指着5,那是几点啊?”这个5解释起来容易,3就有点难了。我只好解释说,5就是五点多,长针比较复杂,长大一点再学吧。

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