二(下)认识几百几十的数课件.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,*,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,*,认识几百几十的数,？,4,个百,5,个十,4,个百和,5,个十合起来是四百五十,千,百,个,十,4,5,0,千,百,个,十,千,百,个,十,370,430,390,400,410,420,一十一十地数，从八百九十数到一千。,890,900,910,920,930,940,950,960,970,980,990,1000,()()()()(),380,350,130,（）百和（）个十合起来是（）,3,5,13,个十是（）,300,220,750,580,300,20=,20,300=,320,300=,320,20=,320,320,300,20,200 50 250,50 200 250,250 200 50,250 50 200,700,300=700,30=,770,700=770,70=,540,500=700,300=,300,600=30,600=,1000,730,70,700,40,400,900,630,400,20=420,（棵）,