春鲁教版

自学课本例题后，仿例计算： （ 1） 8 + 18 （ 2） 7 +2 7 +3 97 （ 3） 3 48 9 13+3 12 通过计算归纳：进行二次根式的加减法时，应。 （四）合作交流，展示反馈 小组交流结果后，再合作计算，看谁做的又对又快

n layers. (5m) Teacher: 1. Draw a check table on the blackboard. 2. Watch the students and guide them to do better. 3. Show the aims for students to choose. (At the same time, students step into the

nts: 1. Choose learning aims. 2. Learn the new content. 1) Learn the new words and read and spell them correctly. 2) Read through the conversations in 1a and try to practice in pairs. Make new

否感觉到了水桶也在拉你。 ③ 观察实验：用红气 球去压绿气球，观察：两个气球都变扁了。 根据以上分析，得出结论 . 一个物体对另一物体施力时，也同时受到另一个物体对它的反作用力。 即 体间力的作用是 .力是 . 知识应用 ： 划船为什么桨用力向后划水船就前进了。 师概括 ： 一个物体对另一物体施力时，也同时受到后者对它的反作用力。 施力物体同时也是受力物体。 物体间力的作用是相互的。 二

better. 3. Show the aims for students to choose. (At the same time, students step into the second step slowly, some by some.) Step Two: Learn by themselves. (20m) Students: 1. Choose learning aims. 2

atch the students and guide them to do better. 3. Show the aims for students to choose (At the same time, students step into the second step slowly, some by some.) Step Two: Learn by themselves.

udents to choose. (At the same time, students step into the second step slowly, some by some.) Step Two: Learn by t hemselves. (20m) Students: 1. Choose learning aims. 2. Learn the new content. 1)

he aims for students to choose. (At the same time, students step into the second step slowly, some by some.) Step Two: Learn by themselves. (25m) Students: 1. Choose learning aims. 2. Learn the new

slowly, some by some.) Step Two: Learn by themselves. (20m) Students: 1. Choose learning aims. 2. Learn the new content. 1) Read the and fill in the planks in 3a, and then read it. 2) Read the

learni ng aims. 2. Learn the new content. 1) Read through the conversations in 2d and try to practice in pairs. Act out the conversations. 2) 3a Match the questions wi th the answers. Practice in