论文部分内容阅读
〔一般教法〕（一）复习。让学生填数 :７８＝８０-□９９＝１００-□８７＝９０ -□１０１＝１００ +□３０２＝３００ +□（二）学习例题。１ 出示例１ :２７６+９８,教师启发学生用简便的方法进行计算 ,重点是让学生理解“多加了要减去”的思考方法 ,并让学生用这种方法进行
〔General teaching〕 (a) review. Let students fill in: 78 = 80- □ 99 = 100- □ 87 = 90 - □ 101 = 100 + □ 302 = 300 + □ (B) learning examples. 1 Example 1: 276 + 98, Instructors Inspired Students To calculate in a simple way, the emphasis is on enabling students to understand the “plus minus minus” way of thinking and to have students use this method