好几天不见冬儿姐姐,晓兰可想她了:“姐姐,你最近都研究了什么数学知识啊?快教教我吧!”冬儿姐姐笑了:“别急,今天我们一起来说说算式谜!”“什么是算式谜?”晓兰还是第一次听说。“所谓算式谜,是一种有趣的数学问题,它的特点是在算式中使一些数字或运算符号‘残缺’,然后让我们根据运算法则进行判断、推理,从而把‘残缺’的算式补充完整。”冬儿姐姐介绍 Days do not see the winter child sister, Xiaolan can think of her: “Sister, you have recently studied what mathematical knowledge? Quick teach me!” “Winter children sister laughed: ” Do not worry, today we Let’s talk about arithmetic puzzle! “” What is the arithmetic puzzle? “Xiaolan is the first time I heard. ”The so-called formula puzzle, is an interesting mathematical problem, which is characterized by some arithmetic or arithmetic symbols ’incomplete’, and then let us judge according to algorithms, inference, so that the ’incomplete’ formula to add Complete. "Donger sister introduced