四年级数学上册第4单元《三位数乘两位数》口算乘法课件1新人教版.ppt

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1、三位数乘两位数(口算乘法),智慧城堡,加油啊!,1、1个人有2只手,10个人有( )只手, 100个人有( )只手。,想一想,说一说。,2、每个班有60个学生,4个班有( )个学生。,20,200,240,你知道吗?,你还知道其它交通工具的速度吗?,人骑自行车1小时 约行16千米。,特快列车1小时约 行160千米。,人骑自行车3小时可以行多少千米?,特快列车3小时可 以行多少千米?,163=?,1603=?,163= (千米),答:人骑自行车3小时可以行48千米。,103=3063=18 30+18=48,163=481603=480,你喜欢哪种方法呢?,48,1603= (千米),答:特快列

2、车3小时可以行480千米。,1003=300603=180 300+180=480,163=481603=480,你喜欢哪种方法呢?,480,快快来参与!,登 山,252=,1506=,713=,184=,1305=,146=,243=,2380=,72,72,50,84,650,760,900,91,为布置“六一”晚会的会场,红、黄、蓝每种颜色的气球各买了40个。,三种颜色的气球共买了多少个呢?,欢乐的节日,403=120(个)答:三种颜色的气球共买了120个。,美丽的草原,蒙古草原上某牧场养细毛羊260只,养的山羊的只数是细毛羊的3倍。,你能算出这个牧场养山羊多少只吗?,可别掉队哟!,小兔子回家,68,96,900,82,480,630,720,92,240,700,840,68,神奇的金字塔,83=,163=,323=,604=,1804=,2404=,24,48,96,240,720,960,买玩具,王阿姨要买3个这样的娃娃,她带了100元,够吗?,一次买3盒,每 盒便宜多少钱?,买口服液,你真棒!,闯关胜利,你收获了 什么?,

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