不少学生由于受小学学习数的影响，数的概念掌握得比较含糊，往往总习惯于把假分数化成带分数，这样导致进入初中阶段学习代数时出现如下一系列弊病：１表现在列代数式中ｘ的１２３与１０的和是：１２３ｘ＋１０（应写成５３ｘ＋１０）２表现在整式的运算中①２ａ－３ｂｃ... Many students are affected by the number of primary schools, the concept of number is relatively vague, and they are always accustomed to turning fake scores into mixed scores. This leads to the following series of disadvantages when they enter the junior high school learning algebra: 1 In the algebraic formula The sum of 123 and 10 of x is: 123x+10 (should be written as 53x+10) 2 is expressed in the operation of the whole formula 12a-3bc...