8加几教学课件.pptx

8加几x(2-6)0A+B+C+D=360 x(2-6)x(2-6)0A+B+C+D=360 x(2-6)复习复习9加几的加法加几的加法9+5=9+3=9+6=9+8=14121517x(2-6)0A+B+C+D=360 x(2-6) 8 + 5= 102314？x(2-6)0A+B+C+D=360 x(2-6)这里把5分成了2和3 为什么不把5分成1和4呢？x(2-6)0A+B+C+D=360 x(2-6)巩固练习巩固练习8 + 6 = 24108 + 7 = 251014153984165784 8 =221210 x(2-6)0A+B+C+D=360 x(2-6) 趣味题来啦！趣味题来啦！x(2-6)0A+B+C+D=360 x(2-6)小结小结x(2-6)0A+B+C+D=360 x(2-6)8+2=8+3=8+4=8+5=8+6=8+7=8+8=10111213141516