最新课件苏教版国标本四年级上册《用计算器计算》课件.ppt

《最新课件苏教版国标本四年级上册《用计算器计算》课件.ppt》由会员分享，可在线阅读，更多相关《最新课件苏教版国标本四年级上册《用计算器计算》课件.ppt（26页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、用计算器计算练习,算一算,找规律,框一框,读一读,(1)678795(2)90231186(3)457142(4)862456,复习:用计算器计算,复习:用计算器计算,1、比一比,看谁算得又对又快.,34,357,9018,48,2922,34,125,3840,12138,3120,65,918,27,3375,练习:,练习1比一比看谁算得又快又对,2.用计算器计算.,948647(3945477)578450252496396(520438),练习2用计算器计算,3.用计算器计算，并找一找各组的规律。,991=,9892=,98793=,987694=,80,880,8880,88880,

2、练习3计算并找规律,991=,9892=,98793=,987694=,80,880,8880,88880,练习3计算并找规律,991=,9892=,98793=,987694=,80,880,8880,88880,991=,9892=,98793=,987694=,80,880,8880,88880,991=,9892=,98793=,987694=,9876595=,98765496=,987654397=,9876543298=,80,880,8880,88880,888880,8888880,88888880,888888880,总结,19+99=,118+989=,1117+9879

3、=,11116+98769=,111115+987659=,1111114+9876549=,11111113+98765439=,111111112+987654329=,100,1000,10000,100000,1000000,10000000,100000000,1000000000,进一步计算找规律1,129-8=,1239-7=,12349-6=,123459-5=,1234569-4=,12345679-3=,123456789-2=,1234567899-1=,100,1000,10000,100000,1000000,10000000,100000000,1000000000

4、,进一步计算找规律2,（10-1）9=,（200-2）9=,（3000-3）9=,（40000-4）9=,（500000-5）9=,（6000000-6）9=,（70000000-7）9=,（800000000-8）9=,1,22,333,4444,55555,666666,7777777,88888888,进一步计算找规律3,应用题1,应用题1分析,应用题2,12345678910111213141516171819202122232425262728293031,15,14,9,16,18,10,11,21,22,23,应用题2分析,1234567891011121314151617181

5、9202122232425262728293031,14,14,9,16,18,10,11,21,22,23,应用题2分析,12345678910111213141516171819202122232425262728293031,16,14,9,16,18,10,11,21,22,23,应用题2分析,12345678910111213141516171819202122232425262728293031,18,14,9,16,18,10,11,21,22,23,应用题2分析,12345678910111213141516171819202122232425262728293031,9,14

6、,9,16,18,10,11,21,22,23,应用题2分析,12345678910111213141516171819202122232425262728293031,10,14,9,16,18,10,11,21,22,23,应用题2分析,12345678910111213141516171819202122232425262728293031,11,14,9,16,18,10,11,21,22,23,应用题2分析,12345678910111213141516171819202122232425262728293031,21,14,9,16,18,10,11,21,22,23,应用题2分析,12345678910111213141516171819202122232425262728293031,22,14,9,16,18,10,11,21,22,23,应用题2分析,12345678910111213141516171819202122232425262728293031,23,14,9,16,18,10,11,21,22,23,应用题2分析,扩展资料,