人教版三年级数学下册第5单元面积练习题课教学课件 12页

练习课面积人教版三年级数学下册 www.youyi100.comwww.youyi100.com200900410练习课 www.youyi100.comwww.youyi100.com练习课 www.youyi100.comwww.youyi100.com练习课 www.youyi100.comwww.youyi100.com米分米厘米平方米练习课4. www.youyi100.comwww.youyi100.com5.同学们出的墙报，长18分米，宽12分米，墙报的面积是多少平方分米？在墙报四周贴一条花边，花边的边长是多少米？练习课 www.youyi100.comwww.youyi100.com墙报的面积是18×12＝216（平方分米）墙报的花边总长是18＋12+18＋12＝60（分米）60分米＝6米答：墙报的面积是216平方分米，花边的总长是6米。练习课 www.youyi100.comwww.youyi100.com√×××练习课6. www.youyi100.comwww.youyi100.com练习课7. www.youyi100.comwww.youyi100.com练习课8. www.youyi100.comwww.youyi100.com练习课 www.youyi100.comwww.youyi100.com练习课