11+11+11+11+11+11+11+11+11+11+11+11=,11*12,=132,1+2+3+ +98+99+100=,（1+100）+（2+99）+（50+51）,=101*50,=5050,执教：盐城市毓龙路实验学校 丁迎春,12条边,36012=30,30,FD 40,30,FD 40,HOME,RT 30,FD 40,HOME,RT 60,FD 40,HOME,RT 90,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,30,方法一,方法二,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,30,方法一,方法二,选择一个你喜欢的方法，在LOGO中画出如下图形。,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,30,方法一,方法二,15,24条边,FD 40,BK 40,RT 15,FD 40,BK 40,RT 15,FD 40,BK 40,RT 15,FD 40,BK 40,RT 15,15,24,30,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,12,FD 40,BK 40,RT 3,FD 40,BK 40,RT 3,FD 40,BK 40,RT 3,120条边,120,需要重复的命令,次数,FD 40 BK 40 RT 30,REPEAT,12,次数,重复的命令,REPEAT,REPEAT命令的基本格式：,REPEAT,24,FD 40 BK 40 RT 15,在LOGO中用REPEAT命令依次画出如下图形。,FD 40,BK 40,RT 15,FD 40,BK 40,RT 15,FD 40,BK 40,RT 15,24,FD 40,BK 40,RT 3,FD 40,BK 40,RT 3,FD 40,BK 40,RT 3,120,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,FD 40,BK 40,RT 30,12,30,FD 40,HOME,RT 30,FD 40,HOME,RT 60,FD 40,HOME,RT 90,30,FD 40,HOME,RT 330,FD 40,HOME,RT 360,REPEAT命令只能针对连续重复的命令来简化。,把你画的蒲公英补充完整。,30,40,15,40,12条边,24条边,120条边,40,3,FD 60 RT 90FD 100 RT 90,（2）LT 90 FD 60 RT 90FD 100 RT 90,实践,用REPEAT命令简化下列命令。,（1）FD 100 RT 120FD 100 RT 120,FD 100 RT 120,REPEAT,REPEAT,LT 90,3,FD 100 RT 120,2,FD 60 RT 90 FD 100 RT 90,FD 60 RT 90FD 100 RT 90,（2）LT 90 FD 60 RT 90FD 100 RT 90,实践,用REPEAT命令简化下列命令。,（1）FD 100 RT 120FD 100 RT 120,FD 100 RT 120,FD 20 RT 90 FD 20 LT 90 FD 20 RT 90 FD 20 LT 90 FD 20 RT 90 FD 20 LT 90 BK 80 LT 90 FD 80,REPEAT 4 FD 20 RT 90 FD 20 LT 90,FD 20 RT 90 FD 20 LT 90,50,实践,用REPEAT命令依次画出如下图形。,10,10,50,功能：简化连续重复的命令。,格式：REPEAT 次数 需要重复的命令,图形,程序,