2016五年级数学下册《练习八》习题课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,练习八,2016,人教版五年级数学下册,练习八,1,、,1.02m,_ dm,960dm,_ m,6270cm,2,_ dm,2,36000cm,_dm,8.63m,2,_dm,2,23dm,_cm,1020,0.96,62.7,36,863,23000,练习八,2,、一个长方体包装盒，从里面量长,28cm,，宽,20cm,，体积为,11.76dm,。爸爸想用它包装一件长,25cm,、宽,16cm,、高,18cm,的玻璃容器，是否可以装下？,h,v,a,b,11760,28,20,420,20,21,（,cm,）,21,18,答：这个长方体包装盒可以装下这个玻璃容器。,11.76 dm,3,11760cm,3,28,25,20,16,练习八,花园小区为居民新安装了,50,个休息的凳子，凳面的长、宽、高分别是,100cm,、,45cm,、,4.5cm,，凳腿的长宽高分别为,45cm,、,5cm,、,35cm,。做这些凳子至少用了混凝土多少方？,1,0.45,0.045,0.45,0.045,0.02025,（,3,）,0.45,0.05,0.35,2,0.0225,0.7,0.01575,（,3,）,(0.02025+0.01575),50,0.036,50=1.8,（,3,）,答：做这些凳子至少用了混凝土,1.8,方。,3,、,100,=1m,45,=0.45m,4.5,=0.045m,5,=0.05m,35,=0.35m,练习八,“,六一,”,儿童节前，全市的小学生代表用棱长,3cm,的正方体塑料拼插积木在广场中央搭起了一面长,6m,、高,2.7m,、厚,6cm,的奥运心愿墙。这面墙一共用了多少块积木,?,6,0.06,2.7,0.36,2.7,0.972,（,m,3,）,0.03,0.03,0.03,0.000027,（,3,）,0.972,0.000027,36000,（块）,答：这面墙一共用了,36000,块积木。,6cm,0.06,3cm,0.03m,4,、,练习八,5,、学校运来,7.6m,的沙子，铺在一个长,5m,、宽,38dm,的沙坑里，可以铺多厚？,h,v,a,b,7.6,5,3.8,1.52,3.8,0.4,（,m,）,答：可以铺,0.4,米。,38dm,3.8m,练习八,6,、请你圈出每组数据中与其他数据不相等的那个数。,（,1,）,5.08m,50800cm,5080dm,5080000cm,（,2,）,6039dm,2,6.039m,2,603900cm,2,60.39m,2,（,3,）,1500cm 1500dm 15m 150dm,练习八,7,、一个长方体的无盖水族箱，长是,6m,，宽是,60cm,，高是,1.5m,。这个水族箱占地面积有多大？需要用多少平方米的玻璃？它的体积是多少？,6,0.6,3.6(m,2,),(6+0.6),2,1.5+6,0.6,6.6,2,1.5+3.6,6.6,3+3.6,19.8+3.6,23.4,（,m,2,）,6,0.6,1.5,6,0.9,5.4,（,m,3,）,答：这个水族箱占地面积有,3.6,平方米,;,需要用,23.4,平方米的玻璃；它的体积是,5.4,立方米。,60cm,0.6m,练习八,8,、一个长方体和一个正方体的棱长总和相等。已知长方体的长、宽、高分别是,6dm,、,5dm,、,4dm,，那么正方体的棱长是多少分米？它们的体积相等吗？,（,6,5,4,）,4,60,（,dm,）,60,12,5,（,dm,）,答：正方体的棱长为,5dm,。,练习八,8,、一个长方体和一个正方体的棱长总和相等。已知长方体的长、宽、高分别是,6dm,、,5dm,、,4dm,，那么正方体的棱长是多少分米？它们的体积相等吗？,6,5,4,120,（,dm,）,5,5,5,125,（,dm,）,答：体积不相等，长方体的体积是,120dm,，,正方体的体积是,125dm,。,练习八,9,、茶厂工人要将长、宽各为,20cm,，高为,10cm,的长方体茶盒装入棱长为,30cm,的正方体纸箱，最多能装几盒？怎样才能装下？,答：最多能装,5,盒。其中,3,盒摞在一起，靠一个角码放，另外,2,盒竖起，放在空余位置。,