读了《对利用天平平衡的道理解方程的思考》(《小学教学》数学版2013年第11期)一文,我深深地被作者石永红老师的教学探索精神所感动。石老师应用天平平衡的原理直观形象地引导学生认识方程,教学深入浅出、形象生动,让学生对解方程的算理有了形象、清晰的认识。然而,现实教学中遇到方程中除数(或减数)是未知数的情况,很多学生会束手无策,教师也常为此伤透脑筋。文中石老师分享自己与同事的交流过程,解开了教 After reading the article “Reflections on Equations to Balance Roads Balanced by Balances” (“Primary School Mathematics”, No. 11, 2013), I was deeply touched by the teaching and exploration spirit of the author, Professor Shi Yonghong. Teacher Shi balance principle balance intuitive guiding students to understand the equation, explain profound theories in simple language, vivid images, so that students have a clear understanding of the equation solution equations. However, the real teaching encountered in the equation divisor (or minus) is unknown situation, many students will do nothing, teachers are often the headache. Text teacher Shi share their exchange process with colleagues, solved the teaching