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1、20 以内减法借十法练习题口诀:进位加法(凑十法口诀:看大数,分小数,凑成十,算得数)退位减法(破十法口诀:看大数,分出 10,减小数,加剩数)如嫌题目太少可更改数字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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