理财与消费 1
美丽的“陷阱”(一) ·····················2
美丽的“陷阱”(二) ·····················6
旅游中的学问——旅费 ················ 11
购卡享优惠 省钱坐地铁(一) ······ 16
购卡享优惠 省钱坐地铁(二) ······ 21
人生的第一次理财 ······················ 27
外卖中的数学问题 ······················ 31
“以旧换新”里的学问 ·················· 36
旅游与文化40
天坛之旅(一) ··························· 41
天坛之旅(二) ··························· 46
青岛之行··································· ·····················52
北京汽车博物馆之旅 ··················· 58
旅游规划中的数学问题 ················ 63
亚洲象,你要去哪里? ················ 67
圆柱容球的故事 ························· 72
方圆中的秘密····························· ·····················77
科技与健康83
便捷小能手——京承高铁 ············· 84
海豚走世界································ ·····················89
嫦娥五号“奔月”记 ··················· 94
北京大兴国际机场有话说 ············· 99
通往机场的轻轨 ························105
袁隆平和他的杂交水稻事业 ·········109
健康小达人修炼手册 ·················· 115
怎样饮食更健康 ························122
为什么不能随意投喂小动物 ·········126
巧办游泳卡····················································130
处处有数学134
举重比赛中的数学 ·····················135
百米赛道,0 的突破 ···················139
神奇的跳眼法····························143
用数据宣告“抗美援朝”的伟大 ···147
“圆环”可以这样想 ····················152
章丘大葱甲天下 ························158
母亲节的礼物·················································163
生活中的快递问题 ·····················166
孝顺的子航····················································172
税收我知道····················································178
爷爷的养虾池·················································182
膨胀的瓶子····················································187
^ 收 起