二年级上册数学课件9的乘法口诀5人教新课标.ppt

9的乘法口诀,复习,比一比,看谁算得又对又快.,67=,58=,86=,75=,64=,78=,84=,77=,83=,37=,42,49,40,32,48,56,35,24,24,21,0,9,18,27,36,45,54,63,72,81,0,9,18,27,36,45,54,63,72,81,19=,29=(),91=,9()=(),一九得九,9,9,18,18,39=(),27,27,49=(),36,36,59=(),45,45,69=(),54,54,79=(),63,63,89=(),72,72,99=(),81,二九十八,三九二十七,四九三十六,五九四十五,六九五十四,七九六十三,八九七十二,九九八十一,9()=(),9()=(),9()=(),9()=(),9()=(),9()=(),2,3,4,5,6,7,8,八九七十二,9的乘法口诀,99=,81,九九八十一,主,1,和,9,组,比,令,91=9,92=18,93=27,97=63,94=36,95=45,96=54,98=72,1,9,2,一九得九,八九七十二,9的乘法口诀,8,7,3,5,4,6,5,6,3,2,4,81,7,1,和,9,组,比,令,主,91=9,92=18,93=27,97=63,94=36,95=45,96=54,98=72,1,9,2,一九得九,八九七十二,九九八十一,9的乘法口诀,8,7,3,5,4,6,5,6,3,2,7,4,8,1,1,和,9,组,比,令,主,91=,92=,93=,97=,94=,95=,96=,98=,18,9,27,36,45,54,63,72,一九得九,二九十八,三九二十七,四九三十六,五九四十五,六九五十四,七九六十三,八九七十二,9的乘法口诀,99=,81,九九八十一,1,和,9,组,比,令,主,91=,92=,93=,97=,94=,95=,96=,98=,36,45,54,63,99=,72,81,9的乘法口诀,9,18,27,101,202,303,404,505,606,707,808,909,4,5,6,7,8,9,1,和,9,组,比,令,主,从表里找出9、9的2倍、3倍倍，把这些数圈起来。,9的乘法口诀,从表里找出9、9的2倍、3倍倍，把这些数圈起来。,9的乘法口诀,从表里找出9、9的2倍、3倍倍，把这些数圈起来。,9的乘法口诀,从表里找出9、9的2倍、3倍倍，把这些数圈起来。,9的乘法口诀,从表里找出9、9的2倍、3倍倍，把这些数圈起来。,9的乘法口诀,找朋友,四九三十六,五九四十五,七九六十三,79,95,96,97,49,59,94,94=,98=,95=,96=,99=,4=36,9=72,9=63,81,36,72,45,54,9,8,7,9=45,5,97=,63,花儿后面藏着谁？,对不对？,59=(54)54=(6)(9)49=(36)79=(36)39=(72)89=(79),(),(),(),45,(),(),(),63,27,72,2.,1.拿9和小圆外面的一个数相乘,很快地说出得数.,活学活用,9,7,63,7,9,63,9,18,思维训练,94+9=(),39+9