若只是加减,拿把围棋子来,摆在饭桌上数给她看。又形象,又清楚。几分钟就搞定一题了。慢慢她就会心算了。
若只是加减,拿把围棋子来,摆在饭桌上数给她看。又形象,又清楚。几分钟就搞定一题了。慢慢她就会心算了。
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