薛雯《整百数乘一位数口算》PPT.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,*,整百数乘一位数口算,镇江实验学校 薛雯,填空,1,、,800,里面有（）个百。,2,、,5,个百是（）。,3,、,12,个百是（）。,4,、,20,个百是（）。,8,500,1200,2000,口算练习,2,4=,20,4=,6,5=,60,5=,3,3=,30,3=,8,9=,80,9=,8,80,30,300,72,9,90,720,小明,小红,小红要跑多少米,?,1,圈跑道长,400,米。,小明,小红,小明要跑多少米,?,1,圈跑道长,400,米。,2,3=,200,3=,6,8=,6,800=,400,7=2800,2,5=10,6,600,48,4800,4,7=28,200,5=1000,2,500=1000,500,900,400,600,200,800,700,=,1,2,3,4,5,6,7,8,9,500,900,400,600,200,800,700,=,1,2,3,4,5,6,7,8,9,2,1000,1800,800,1200,400,1600,1400,500,900,400,600,200,800,700,=,3,1500,2700,1200,1800,600,2400,2100,1,2,3,4,5,6,7,8,9,500,900,400,600,200,800,700,=,4,2000,3600,1600,2400,800,3200,2800,1,2,3,4,5,6,7,8,9,500,900,400,600,200,800,700,=,5,2500,4500,2000,3000,1000,4000,3500,1,2,3,4,5,6,7,8,9,500,900,400,600,200,800,700,=,6,3000,5400,2400,3600,1200,4800,4200,1,2,3,4,5,6,7,8,9,500,900,400,600,200,800,700,=,7,3500,6300,2800,4200,1400,5600,4900,1,2,3,4,5,6,7,8,9,500,900,400,600,200,800,700,=,8,4000,7200,3200,4800,1600,6400,5600,1,2,3,4,5,6,7,8,9,500,900,400,600,200,800,700,=,9,4500,8100,3600,5400,1800,7200,6300,1,2,3,4,5,6,7,8,9,1002=,102=,122=,3003=,303=,323=,4200=,420=,421=,2300=,230=,233=,200,20,24,84,80,800,96,90,900,66,60,600,看谁算得又对又快,正方形果园的边长是,800,米。沿果园四周走一圈，一共要走多少米？,800,4=3200,（米）,答：一共要走,3200,米。,考考你：,每张门票,5,元，三年级,198,个同学参观，估一估，带,1000,元够吗？,再加上,3,位老师还够吗？,口算练习,2,4=,20,4=,6,5=,60,5=,3,3=,30,3=,8,9=,80,9=,8,80,30,300,72,9,90,720,200,4=,800,600,5=,3000,300,3=,900,800,9=,7200,练一练：,1,、你能算得又对又快吗？,100,2=4,200=300,3=2,300=,10,2=4,20=30,3=2,30=,12,2=4,21=32,3=2,33=,500,3=,3,400=,900,3=,400,6=6,800=,700,4=,600,5=,500,8=,2,、你能解决下面的问题吗？,