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破十法的口诀是什么

更新时间: 2021-01-22 19:41:26     

1、十几减九,几加一。十几减七,几加三。十几减五,几加五。十几减三,几加七。

2、十几减八,几加二。十几减六,几加四。十几减四,几加六。十几减二,几加八。

3、减九加一,减八加二,减七加三,减六加四,减五加五,减四加六,减三加七,减二加八,12-9,2+1=3,17-8,7+2=9。

关键词: 口诀 什么

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