1、第 3 课 时 练习八,0.70.3,1.60.4,0.650.25,4.50.5,0.820.42,63.4,5,1,1.2,9.4,0.4,0.4,1.你能直接写出得数吗?,巩固练习,83.02,0.631.5,11.02,2.13,2.用竖式计算。,.00,1,巩固练习,2.用竖式计算。,5.460.6,17.54.5,4.86,13,0,.,巩固练习,(1)小冬家和小华家相距多少千米?,答:小冬家和小华家相距了2.1千米。,2.1(千米),0.551.55,2,1,0,.,1,1,3.,巩固练习,(2)各自从家到学校,小华要比小冬多走多少千米?,答:小华要比小冬多走1千米。,1(千米)
2、,1.550.55,1,0,0,.,3.,巩固练习,(3)小华从家到少年宫一共要走多少千米?,答:小华从家到少年宫一共要走4.25千米。,2.1(千米),1.550.55,4.25(千米),2.12.15,2,1,0,4,2,5,.,.,1,1,3.,巩固练习,8.36,7.4,96,.,.,.,.,巩固练习,5.计算下面各题,并验算。,9.618.4,2,0,.,9.6,28,8,0.322.28,2,0,.,0.32,2.6,6,1,1,1,18.4,2,0,.,9.6,8,1,1,2,0,.,2.28,6,1,巩固练习,5.计算下面各题,并验算。,3.971.03,6,.,7.33,5,
3、0,7.336.7,0.63,3,5,0,.,3.97,0,7,3,.,0.63,3,.,1,1,1,5,0,.,3.97,0,1,1,巩固练习,5.计算下面各题,并验算。,255.6,4,.,25.0,19.4,8.65.74,8,0,.,2.8,2.86,6,6,9,1,1,2,0,.,19,5,.,4,1,.,.,1,2,6,.,8.6,8,0,.,.,巩固练习,6.动物园里一只长颈鹿的身高是6米,一只大猩猩的身高是1.65米。长颈鹿比大猩猩高多少米?,61.65,答:长颈鹿比大猩猩高4.35米。,4.35(米),0,4,3,5,.,0,.,.,巩固练习,0.830.5,3.43.1,9
4、.26,0.730.23,3.62.4,22.8,0.5,0.33,0.3,4.8,3.2,6,7.直接写出得数。,巩固练习,0.452.86,3,1,.,0.45,2,5,.,17.6,3.31,3,17.63.9,21.5,1,0,2,.,6.1,1,1,.,14.0,0.32,3,143.9,10.1,0,6.15.78,0,1,1,1,1,.,.,.,8.,巩固练习,9.,(1)孙宁跳过了多少米?,答:小冬家和小华家相距了1.25米。,1.25(米),1.30.05,1,2,5,.,.,巩固练习,9.,(2)王晓芳跳的高度比孙宁低多少米?,0.1(米),1.251.15,0,1,0,.
5、,答:王晓芳跳的高度比孙宁低0.1米。,巩固练习,10.下面是一个病人某日0时至24时的体温记录。,(1)这一天,他的最高和最低体温相差多少 ?,答:这一天,他的最高和 最低体温相差1.4。,1.4(),39.137.7,.,1,4,.,巩固练习,10.下面是一个病人某日0时至24时的体温记录。,(2)从12时到16时,他的体温升高了多少 ?,答:从12时到16时,他的 体温升高了0.8 。,0.8(),39.138.3,.,0,8,.,巩固练习,10.下面是一个病人某日0时至24时的体温记录。,(3)这一天开始与结束时,他体温相差多少 ?,答:这一天开始与结束时,他体温相差0.9。,0.9(
6、),38.637.7,.,0,9,.,巩固练习,(1)热水瓶比铁锅贵多少元?,答:热水瓶比铁锅贵15.7元。,15.7(元),38.522.8,.,5,7,.,11.,1,巩固练习,(1)保温杯比水壶便宜多少元?,答:保温杯比水壶便宜4.5元。,4.5(元),1510.5,.,4,5,.,11.,巩固练习,(2)买一个保温杯和一口铁锅,一共需要多少元?,答:一共需要33.3元。,33.3(元),10.522.8,1,3,3,.,11.,3,巩固练习,(2)妈妈付出40元,应找回多少元?,答:应找回6.7元。,6.7(元),4033.3,.,6,7,.,11.,.,巩固练习,12.一台拖拉机上午耕地3.96公顷,下午比上午多耕地0.98公顷。这天一共耕地多少公顷?,答:这天一共耕地8.9公顷。,4.94(公顷),3.960.98,8.9(公顷),4.943.96,4,9,4,8,9,0,.,.,1,1,1,1,巩固练习,13.小力用竖式计算5.1加一个两位小数时,把加号看成了减号,得2.76.你能帮他算出正确的结果吗?,答:正确结果是7.44。,2.34,5.12.76,7.44,5.12.34,2,3,4,7,4,4,.,.,.,.,巩固练习,