Keke's Math

Keke practices math online after shcool every day.

This is an assignment by her teacher.

The first day when she was working on it, 非常有趣。 一道加法必须在有限时间答完,可可手指头飞快的动着,十以上的加法在拼命的数加几个。 后来熟悉些了,尽管不明显了,手指头也在悄悄的动。

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