（北师大版）四年级数学下册课件文具店1.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,*,买文具,北师大版四年级数学下册,2、一支圆珠笔,2,元，买,4,支要多少钱？,2 4=,2+2+2+2=,1、口 算：,254=,12 5=,7 20=,2.5+2=,3002=,2角4=,3.6-2.4=,4.7+2.6=,5 1.8=,你能提出什么数学问题？,买4块,要多少钱？,0.2元,0.2元,0.2元,0.2元,0.8,0.2,+,0.2+0.2+0.2+0.2=,0.2,0.2,0.8（元）,0.2,0.2,0.2,0.2,0.2,0.8,0.2,0.4,0.6,0.8,0.24=?,0.2元=2角,24=8（角）,8角=0.8元,0.24=0.8（元）,买,3,把尺子需要多少元？,0.43,（）,1,2,3,0.4,元,4,角,34,12,（角）,12,角,1.2,元,0.43,1.2,（元）,0.4,0.4,0.4,答：买,3,把尺子需要,1.2,元。,1.2,元,3.,0.3,3,0.2,8,4,0.2,3,0.5,0.4,4,0.1,9,0.7,2,6,0.2,0.6,4,0.9,1.5,1.4,1.6,1.6,1.2,0.8,0.9,2.4,涂一涂，填一填。,0.0110=（）,0.1,涂一涂，填一填。,0.0150=（）,0.5,涂一涂，填一填。,0.01100=（）,1,考考你！,通过学习，你学会怎么样计算小数的乘法了吗？我们来做个小测验吧，看看谁掌握的最好。,加油哦！,0.123,0.242,0.43,0.33,0.01,10,0.01,50,0.5,0.1,4,6,0.4,6,3,2,0.3,2,做一做,6,0.6,24,2.4,