Problem 1 What is the value of ? Problem 2 Pablo buys popsicles for his friends. The store sells single popsicles for  each, 3-popsicle boxes for  each, and -popsicle boxes for . What is the greatest number of popsicles that Pablo can buy with ? Problem 3 Tamara has three rows of two 6-feet by 2-feet flower beds in her garden. The beds are separated and also surrounded by 1-foot-wide walkways, as shown on the diagram. What is the total area of the walkways, in square feet? Problem 4 MiaRead More

2017-02-09 21:10:00 来源: 澎湃新闻网(上海) 当地时间2月8日，美国国家工程院（The National Academy of Engineering ，NAE）公布了最新......