歌莉嘉发现乘5新法美国10岁女孩歌莉嘉在分析乘数表时,发现了各数乘以5的简便算法,即双数折半后添一个0,单数减1后折半添一个5。此法简便、实用,将为全美学校所采用。玛丽·安尼发现鱼龙化石1814年,英国12岁女孩玛丽·安尼因家里很穷,常到海边拣贝壳和化石出售。她把拣到的贝壳卖给商人加工装饰品,把化石卖给一家博物馆做展品。一次,玛 Grigori found that when she was analyzing the multiplier tables, the 10-year-old U.S. girl Gory Jia discovered a simple algorithm that multiplies each number by 5, that is, adding a 0 after the double number, and subtracting 1 from the odd number after adding 5 to the odd number. This method is simple, practical and will be used by schools in the United States. Mary Anni found fish fossils in 1814, Britain’s 12-year-old girl, Mary Anny, was very poor at home, often picking shells and fossils from the beach for sale. She sells the picked shells to merchants for processing decorations and sells the fossils to a museum for exhibits. Once, Ma