小学数学人教2011课标版二年级表内除法（二）的整理和复习.ppt

1、表内除法的整理和复习,义务教育课程标准教科书 二年级下册,十堰东风51小学 罗金凤,被除数从1开始依次加1,被除数从2开始依次加2,被除数从3开始依次加3,算式在第几行，被除数就从几开始依次加几。,除数依次是19,除数依次是19,除数依次是19,除数都是1 9。,=1,=1,=1,=1,=1,=1,=1,=1,=1,=2,商都是1,=2,=2,=2,=2,=2,=2,=2,=2,商都是2,=3,=3,=3,=3,=3,=3,=3,=3,=3,商都是3,算式在第几行，商就是几。,被除数从1开始依次 加1,被除数从2开始依次 加2,被除数从3开始依次 加3,算式在第几列，被除数就从几开始依次加几。

2、,第1列除数都 是1,第2列 除数都 是2,第3列 除数都 是3,算式在第几列,除数就是几。,11,22,33,44,55,66,77,88,99,21,31,41,51,61,71,81,91,42,63,84,105,126,147,168,189,62,82,102,122,142,162,182,93,123,153,183,213,243,273,124,164,204,244,284,324,364,155,205,255,305,355,405,455,186,246,306,366,426,486,546,217,287,357,427,497,567,637,248,279,

3、328,408,488,568,648,728,369,459,549,639,729,819,66,=1,=2,=3,=4,=5,=6,=7,=8,=9,商依次是 1-9,=1,=2,=3,=4,=5,=6,=7,=8,=9,商依次是 1-9,=1,=2,=3,=4,=5,=6,=7,=8,=9,商依次是 1-9,每一列商都是19,11,22,33,44,55,66,77,88,99,21,31,41,51,61,71,81,91,42,63,84,105,126,147,168,189,62,82,102,122,142,162,182,93,123,153,183,213,243,273

4、,124,164,204,244,284,324,364,155,205,255,305,355,405,455,186,246,306,366,426,486,546,217,287,357,427,497,567,637,248,279,328,408,488,568,648,728,369,459,549,639,729,819,66,=1,=2,=3,=4,=5,=6,=7,=8,=9,商依次是 19,=1,=2,=3,=4,=5,=6,=7,=8,=9,商依次是 19,每一列商都是19,=1,=1,=1,=1,=1,=1,=1,=1,=1,被除数和除数相同时，商是1。,=2,=3,=

5、4,=5,=6,=7,=8,=9,除数是1时，商和被除数相同。,287,284,11,33,44,55,66,77,88,99,22,21,31,41,51,61,71,81,91,42,63,84,105,126,147,168,189,62,82,102,122,142,162,182,93,123,153,183,213,243,273,124,164,204,244,324,364,155,205,255,305,355,405,455,186,246,306,366,426,486,546,217,287,357,427,497,567,637,248,279,328,408,488

6、,568,648,728,369,459,549,639,729,819,284,=4,=7,42=2,164=4,497,=7,819=9,11=1,93=3,255=5,366=6,648=8,三、当堂检测,1、口算出指定算式的商，并说出用的是哪句乘法口诀。,6,3,5,9,7,8,4,369,三、当堂检测,2、,18 6,36 9,40 8,54 9,63 9,56 7,45 5,3、,（1）30元钱一共可以买多少盒冰激凌？,（2）12元一共买了4瓶饮料，一瓶饮料多少钱？,（3）你还能提出其他用乘法或除法解决的问题并解答吗？,3056（盒） 答：一共可以买6盒冰激凌。,1243（元） 答：一瓶饮料3元钱。,三、当堂检测,一道除法题，除数是6，小明把被除数的十位数字和个位数字看颠倒了，结果除得的商是4，这道题正确的商