得数是9的加法 与相应的减法,一：复习,5+3=,8,7-3=,4,7-7=,0,6+0=,6,0+8=,8,7+1=,8,2+5=,7,6+2=,8,8-0=,8,4+4=,8,3+3=,6,2+5=,7,9,5,9,3,2,7,1,8,9,4,9,6,8+1=9,1+8=9,例1：,9-1=8,9-8=1,8+1=9,1+8=9,9-1=8,9-8=1,例2：摆一摆,7+2=9,2+7=9,9-2=7,9-7=2,7+2=9,2+7=9,9-2=7,9-7=2,6+3=9,3+6=9,例3：摆一摆,9-3=6,9-6=3,6+3=9,3+6=9,9-3=6,9-6=3,5+4=9,4+5=9,例4：摆一摆,9-4=5,9-5=4,5+4=9,4+5=9,9-4=5,9-5=4,小结:,8+1=9,7+2=9,6+3=9,5+4=9,4+5=9,3+6=9,2+7=9,1+8=9,9-1=8,9-2=7,9-3=6,9-4=5,9-5=4,9-6=3,9-7=2,9-8=1,巩固练习：,6+3=,9,3+6=,9,9-3=,6,3,9-6=,4+5=,9,5+4=,9,9-5=,4,9-4=,5,找朋友,3+6,7+1,3+3,1+4,8,9,5,6,开锁游戏,发散思维练习,3+( )=9,9-( )=5,4+5 7,9 6+3,9-1 9,9 8 =1,4,6,=,-,
