进入专题开始 ,希望你能根据“知能目标”所列项目举例说明 ,了解目前自己对本专题内容的掌握情况 ,以此督促自己做好补偿性学习 .“知能目标”可引导你回顾所学内容 ,并提高你对数学的认识 ,一定不要忽略了 !【知能目标】1 列代数式了解代数式的意义 ,能规范地书写代数式 ;能 After entering the topic, I hope you can exemplify the items listed in the “know goal” and understand the current situation of your own knowledge of this topic, in order to supervise yourself for compensatory learning. “Knowing goals” can guide you to review what you have learned. And improve your understanding of mathematics, must not be overlooked! [know goal] 1 algebraic formulas to understand the meaning of algebraic expressions, can algebraic formulas can be written;