5年级 奥数与智能思维(上).docVIP

第一章 空间与图形（一）······················································ 第一讲 长方形、正方形的周长··········································· 第二讲 长方形、正方形的面积··········································· 第三讲 分类数图形····················································· 第二章 实践与应用（一）······················································ 第一讲 一般应用题（一）················································ 第二讲 一般应用题（二）················································ 第三讲 一般应用题（三）················································ 第三章 趣题与智巧··························································· 第一讲 数阵··························································· 第二讲 周期问题······················································· 第四章 数与计算····························································· 第一讲 小数巧算（一）·················································· 第二讲 小数巧算（二）·················································· 第三讲 循环小数······················································· 第五章 空间与图形（二）······················································ 第一讲 组合图形面积（一）·············································· 第二讲 组合图形面积（二）·············································· 第六章 实践与应用（二）······················································ 第一讲 倍数问题（一）·················································· 第二讲 倍数问题（二）·················································· 第三讲 平均数（一）···················································· 第四讲 平均数（二）···················································· 第七章 数论与整除··························································· 第一讲 尾数与余数····················································· 博思五年级奥数——长方形、正方形的周长 用3个边长为3厘米的正方形，拼成一个大长方形时，这个大长方形的周长是多少厘米？它比3个正方形的周长和少多少厘米？ 练习 1、用5个边长为2厘米的正方形拼成一个大长方形，这个大长方形的周长是多少厘米？ 2、把两个长为20厘米，宽为10厘米的长方形拼成一个大长方形。大长方形的周长是多少厘米？ 求下图的周长。（单位：厘米） 练习 1、求下图的周长。（单位：厘米） 2、下图由五个边长都是3厘米的正方形组成。求这两个图形的周长。 （1）