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珠心算口诀

更新时间: 2021-04-11 18:12:03     

1、下珠不,下5减凑数;

2、下够减,去5加凑数;

3、档不够加10减补数;

4、个位档不够减,减10加补数,凑数:两数相加为5;补数:两数相加为10。

5、儿歌口诀:

加一请拨双下九,我们都是好朋友;

加二请拨双下八,开心时候笑哈哈;

加三请拨双下七,有时也会生生气;

加四请拨双下六,快乐时候蹦又跳。

减一请拨双上九,唱歌要学百灵鸟;

减二请拨双上八,做事不要太拖拉;

减三请拨双上七,排队做操要整齐;

减四请拨双上六,早上不要睡懒觉。

关键词: 心算 口诀

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