二年级数学“9的乘法口诀”新授课结束后,教师设计了以下一组充满童趣的连环练习。先用电脑出示“小猴吹泡泡”的画面,一下子就引起学生的兴趣。“每个泡泡上都有两道算式,你们会做吗?看谁算得又对又快。” The second grade mathematics “9 multiplication formula” After the new lectures, the teacher designed the following group of playful series exercises. First use the computer to produce “monkey blowing bubble” screen, suddenly aroused the interest of students. "There are two formulas on every bubble, will you do it?