北京版数学二年级上册《9的乘法口诀》

1、欢迎来访，敬请指导thank you!thank you!thank you!thank you!,北京版二年级数学上册,9的乘法口诀,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,学习目标： 1. 使同学们学会9的乘法口诀。 2. 能够熟记9的乘法口诀。,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,数 桃 子,199,2918,39,49,59,69,79,89,99,1个9,2个9,3个9,4个9,5个9,6个9,7个9,8个9,9个9,欢迎来访，敬请指导thank you!tha

2、nk you!thank you!thank you!,9 1 =,9 2 =,9 3 =,9 7 =,9 4 =,9 5 =,9 6 =,9 8 =,18,9,27,36,45,54,63,72,19 =,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,9,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,9 1=,9 2=,9 3=,9 7=,9 4=,9 5=,9 6=,9 8=,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,

3、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,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,9 1 =,9 2 =,9 3 =,9 7 =,9 4 =,9 5 =,9 6 =,9 8 =,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,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,9 1 = ,9 2 = ,9 3 = ,9

4、7 = ,9 4 = ,9 5 = ,9 6 = ,9 8 = ,36,45,54,63,99 = ,72,81,9的乘法口诀,9,18,27,10 1,20 2,30 3,40 4,50 5,60 6,70 7,80 8,90 9,4,5,6,7,8,9,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,9 1 = 9,9 2 = 1 8,9 3 = 2 7,9 7 = 6 3,9 4 = 3 6,9 5 = 4 5,9 6 = 5 4,9 8 = 7 2,1,9,2,一九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

5、,6,3,2,7,4,99 =,81,九九八十一,8,1,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,9 1 =,9 2 =,9 3 =,9 7 =,9 4 =,9 5 =,9 6 =,9 8 =,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,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,归纳,1. 9的乘法口诀有9句，每相邻两句口诀的得数 相差9。 2

6、. 9的9倍比90少9。也就是9和几相乘就等于几十减几的差。 3. 积的十位数字与个位数字的和都是9。 4. 有几句乘法口诀，积的个位和十位的数字相互交换了位置，比如，二九十八，九九八十一，18，81。,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,一九 _,9的乘法口诀,得九,二十七,四十五,十八,三十六,八十一,六 九,对口令,_ _ 五十四,三九_,七九_,二九 _,四九_,八九_,九九 _,五九_,六十三,七十二,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,想口诀，积是几。 9

7、 1= 9 4= 9 7= 9 2= 9 5= 9 8= 9 3= 9 6= 9 9=,9,36,63,18,45,72,27,54,81,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,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？,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,对不对？,59= ( 54 ) 54=( 6 )( 9 ) 49= ( 36 ) 79= ( 36 ) 39= ( 72) 89= ( 79 ),( ),( ),( ),45,( ),( ),( ),63,27,72,欢迎来访，敬请指导thank you!thank you!thank you!thank you!,9的乘法口诀,910 = ,90,动脑筋,？,欢迎来访，敬请指导thank you!thank you!thank you!thank you