一、“活”在方程思想的早期孕伏简易方程虽系高年级教材,但方程思想却在低、中年级已作了早期孕伏,例如题组。 3+0=□ 4-0=□ 3+1=□ 4-1=□ 3+2=□ 4-2=□不要把它们看作一个个孤立的算式,不妨把它们分别看作定义在集合{0,1,2,}上的函数y=3+x和y=4-x。有意识地引导学生初步领略一下和、差的变化规律,以激发学生逻辑思维能力的培养。 First, the “live” equation in the early pregnancy simple equations Although the Department of higher grade textbooks, but the idea of ​​the equation is low, the middle-aged have been pregnant early pregnancy, for example, the problem group. 3 + 0 = □ 4-0 = □ 3 + 1 = □ 4-1 = □ 3 + 2 = □ 4-2 = □ Do not think of them as isolated algorithms. Think of them separately as defined in the set The functions y = 3 + x and y = 4-x on {0,1,2,}. Consciously guide students to a preliminary look and difference, the law of change to stimulate students' ability to train logical thinking.