一、游戏激趣,导入新课.教师先出示如下竞赛题:1.用三角形片摆一摆:12个三角形片,平均分成3份,每份摆成一排.2.填空:“12÷3=4”读作(),表示把()平均分成()份,每份是().3 用正方形片摆一摆:12个正方形片,按每4个摆成一排.教师讲明游戏规划:按四人小组进行比赛,哪一个小组最先完成以上各题,且完 First, the game interesting, import a new lesson. Teachers first show the following contest questions: 1. Triangle piece posing: 12 triangular pieces, divided into three copies, each placed in a row .2 fill in the blank: “12 ÷ 3 = 4 ”is read as (), said () is divided equally into () copies, each copy is () .3 square with a pendulum: 12 squares, arranged in every 4 rows. : According to the four-member team competition, which one team to complete the above questions, and finished