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1、20 以內(nèi)減法借十法練習(xí)題口訣:進(jìn)位加法(湊十法口訣:看大數(shù),分小數(shù),湊成十,算得數(shù))退位減法(破十法口訣:看大數(shù),分出 10,減小數(shù),加剩數(shù))如嫌題目太少可更改數(shù)字5107例 :15 8 =2(一)218 9 =17 9 =16 9 =15 9 =14 9=13 9 =12 9 =11 9=17 8 =(二)16 8 =15 8=14 8 =13 8 =12 8 =11 8 =16 7 =15 7 =14 7 =13 7 =12 7=11 7 =15 6 =14 6 =13 6 =12 6 =11 6=14 5 =4135 =12(三)5 =115 =13 4 =12 4 =11 4=12
2、3 =11 3 =11 2 =13 5 =12 5 =11 5 =13 4 =12 4 =11 4=16 7 =15 7 =14 7 =(四)18 9 =17 9 =16 9 =15 9 =14 9=13 9 =13 7 =12 7=11 7 =12 9 =11 9=17 8 =16 8 =15 8=14 8 =13 4 =12 4 =11 4=(五)12 3 =11 3 =11 2 =15 9 =14 9=13 9 =513 5 =12 5 =11 5 =13 8 =12 8 =11 8 =16 7 =15 7 =14 7 =12 6 =11 6=14 5 =(六)13 4 =12 4 =1
3、1 4=12 6 =11 6=14 5 =612 3 =11 3 =11 2 =13 5 =12 5 =11 5 =13 8 =12 8 =11 8 =16 7 =15 7 =14 7 =(七)15 9 =14 9=13 9 =1313 4 =12 4 =11 4=16 7 =15 7 =14 7 =18 9 =17 9 =16 9 =15 9 =14 9=13 9 =13 7 =12 7=11 7 =(八)12 9 =11 9=17 8 =16 8 =15 8=14 8 =13 4 =12 4 =11 4=16 7 =15 7 =14 7 =18 9 =17 9 =16 9 =15 9 =1
4、4 9=13 9 =(九)13 7 =12 7=11 7 =12 9 =11 9=17 8 =16 8 =15 8=14 8 =13 4 =12 4 =11 4=12 3 =11 3 =11 2 =13 5 =12 5 =11 5 =(十)13 8 =12 8 =11 8 =16 7 =15 7 =14 7 =12 6 =11 6=14 5 =15 9 =14 9=13 9 =13 4 =12 4 =11 4=12 3 =11 3 =11 2 =(十一)13 5 =12 5 =11 5 =13 8 =12 8 =11 8 =16 7 =15 7 =14 7 =12 6 =11 6=14 5 =
5、15 9 =14 9=13 9 =13 4 =12 4 =11 4=(十二)16 7 =15 7 =14 7 =18 9 =17 9 =16 9 =15 9 =14 9=13 9 =13 7 =12 7=11 7 =12 9 =11 9=17 8 =16 8 =15 8=14 8 =(十三)13 4 =12 4 =11 4=16 7 =15 7 =14 7 =18 9 =17 9 =16 9 =15 9 =14 9=13 9 =13 7 =12 7=11 7 =12 9 =11 9=17 8 =(十四)16 8 =15 8=14 8 =1413 4 =12 4 =11 4=12 3 =11 3
6、 =11 2 =13 5 =12 5 =11 5 =13 8 =12 8 =11 8 =16 7 =15 7 =14 7 =(十五)12 6 =11 6=14 5 =1515 9 =14 9=13 9 =13 4 =12 4 =11 4=12 3 =11 3 =11 2 =13 5 =12 5 =11 5 =13 8 =12 8 =11 8 =(十六)16 7 =15 7 =14 7 =1712 6 =11 6=14 5 =15 9 =14 9=13 9 =13 4 =12 4 =11 4=16 7 =15 7 =14 7 =18 9 =17 9 =16 9 =(十七)15 9 =14 9=1
7、3 9 =13 7 =12 7=11 7 =12 9 =11 9=17 8 =16 8 =15 8=14 8 =“”“”at the end, xiao bian gives you a passage. minand once said, people who learn to learn are very happy people. in every wonderful life, learning is an eternal theme. as a professional clerical and teaching position, i understand the importan
8、ce of continuous learning, life is diligent, nothing can be gained, only continuous learning can achieve better self. only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. this document
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