用计算器计算PPT课件.ppt

用计算器计算,计算器在生活中的应用,古代的计算工具,算筹,算盘,手摇式计算器,显示器,键盘,关机键,用计算器计算：,3827,3018,65,540,30.,30.,18.,540.,38.,38.,27.,65.,用计算器计算：,765469143825763028296558976,62525416001287654692968166827,1234,4014,63,44764,25,325,938,324,下面各题，哪一个算式的计算结果是正确的,1、85713542303574822、85713542303584823、8571354230359482,练一练,3009875356100036040765469269,2700,311500,600,965,比一比,12580,375153,16875,0,人机比赛,看谁算得快?,9999999999,495,考考你（1）,1428571142857214285731428574,14285751428576,142857,285714,428571,571428,714285,857142,考考你（2）,11111111111111111111,1111111111111111111111,1,121,12321,1234321,123454321,12345654321,考考你（3）,49449944499944449999,4444499999,36,4356,443556,44435556,4444355556,12345678910111213141516171819202122232425262728293031,15,14,14,14,9,16,18,10,11,21,22,23,12345678910111213141516171819202122232425262728293031,14,12345678910111213141516171819202122232425262728293031,16,12345678910111213141516171819202122232425262728293031,18,12345678910111213141516171819202122232425262728293031,9,12345678910111213141516171819202122232425262728293031,10,12345678910111213141516171819202122232425262728293031,11,12345678910111213141516171819202122232425262728293031,21,12345678910111213141516171819202122232425262728293031,22,12345678910111213141516171819202122232425262728293031,23,12345678910111213141516171819202122232425262728293031,23,2,3,6,5,0,0,2,4,0,0,0,0,0,0,5,2,6,3,2,4,5,0,0,0,据统计，一个没有关紧的水龙头，每小时大约滴水3千克。,用计算器计算,（1）照这样计算，一天会浪费（）千克