本书严格遵循现行小学数学课程标准精心编纂，巧妙运用引人入胜的故事情节作为知识载体，将抽象的小学数学概念与原理生动展现。通过细致入微的知识点讲解，结合精心设计的动脑思考题与动手实践环节，不仅激发了学生的学习兴趣，更培养了他们的主动探索精神。书中穿插典型例题及其变形题目，辅以深入浅出的解析，鼓励学生触类旁通，深化对数学知识的理解与应用能力。此选题特别注重数学思维的磨砺与拓展，引领学生窥见数学之美，探索其背后的逻辑与奥秘，为学生拓宽视野、丰富知识底蕴奠定坚实基础。

第1 讲 循环小数·················································.1
第2 讲 小数乘法的巧算········································.5
第3 讲 小数除法的巧算········································.9
第4 讲 小数四则运算···········································12
第5 讲 平均数····················································16
第6 讲 面积计算（1）··········································20
第7 讲 面积计算（2）··········································25
第8 讲 周期问题·················································30
第9 讲 盈亏问题·················································34
第10 讲 假设法解题·············································38
第11 讲 巧数图形················································42
第12 讲 巧算表面积·············································46
第13 讲 涂色问题················································52
第14 讲 巧算体积（1） ········································57
第15 讲 巧算体积（2） ········································62
第16 讲 数的整除················································66
第17 讲 分解质因数·············································70
第18 讲 优选公因数·············································74
第19 讲 最小公倍数·············································78
第20 讲 奇偶性分析·············································82
第21 讲 巧比分数的大小·······································86
第22 讲 分数求和技巧··········································89
第23 讲 列方程解应用题（1） ·······························93
第24 讲 列方程解应用题（2） ·······························98
第25 讲 相遇问题·············································.102
第26 讲 追及问题·············································.107
第27 讲 流水行船问题·······································.111
第28 讲 容斥原理·············································.115
第29 讲 找次品················································.119
第30 讲 逻辑推理·············································.123