数字的增减与比较,同人们朝夕相伴,不仅日常生活里经常使用,而且在教学、科研、论文、书稿、文件中频繁出现。可以说,市场经济下的人离不开数量及其变化。有人对小学算术课学过的数字增减、比较知识,因其“简单”往往掉以轻心;而某些社科作者又可能以为那是数学问题,不屑理睬关 The increase, decrease and comparison of numbers are accompanied by daily and daily use not only in daily life, but also in teaching, scientific research, theses, manuscripts and documents. It can be said that the number of people under the market economy and its changes can not be separated. Some people increase or decrease the number of math classes learned in primary schools and compare their knowledge because they tend to be “light-hearted” because of their “simplicity.” Some social-science writers may think it a math problem and ignore it