《整十、整百数乘一位数的口算及算估算.ppt》由会员分享，可在线阅读，更多相关《整十、整百数乘一位数的口算及算估算.ppt（21页珍藏版）》请在三一文库上搜索。
1、苏教版三年级数学上册,整十数、整百数乘一位数的口算及估算,温故知新,56= 78= 95= 66= 29= 48= 77= 63=47= 35= 88= 52=,30,56,45,36,18,32,49,18,28,15,64,10,探索新知,60,根,答：一共有60根。,探索新知,600,1600,巩固练习,42 = 36= 58= 402= 360= 580=4002= 3600= 5800=,8,80,800,18,180,1800,40,400,4000,通过计算，你发现了什么？,打气球啦！,2003,209,8004,1007,905,4005,探索新知,探索新知,3,7,6,4,8
2、,5,9,50,移动上面的卡片，算出上下两个数的积。,150,350,300,200,400,250,450,503=150,巩固练习,3,7,6,4,8,5,9,90,移动上面的卡片，算出上下两个数的积。,270,630,540,360,720,450,810,巩固练习,3,7,6,4,8,5,9,400,移动上面的卡片，算出上下两个数的积。,1200,2800,2400,1600,3200,2000,3600,巩固练习,3,7,6,4,8,5,9,600,移动上面的卡片，算出上下两个数的积。,1800,4200,3600,2400,4800,3000,5400,巩固练习,3,7,6,4,8
3、,5,9,700,移动上面的卡片，算出上下两个数的积。,2100,4900,4200,2800,5600,3500,6300,巩固练习,3,7,6,4,8,5,9,60,移动上面的卡片，算出上下两个数的积。,180,420,360,240,480,300,540,巩固练习,3,7,6,4,8,5,9,900,移动上面的卡片，算出上下两个数的积。,2700,6300,5400,3600,7200,4500,8100,巩固练习,巩固练习,60,360,900,280,360,6400,90,100,6300,巩固练习,60,120,540,60,300,480,巩固练习,巩固练习,巩固练习,小 结,今天我们学了什么？今天你有什么收获呢？,