一年级数学课件_下册整十数加减整十数.ppt

整十数加 减整十数,10,20,10,20,30,a,红花和黄花一共有,多少盆？,b,红花和紫花一共有多少盆？,c,黄花和紫花一共有多少盆？,10,20,20,10,10,30,30,10,20,30,30,20,30,30,40,40,50,50,20,30,10,我要搬走,10,盆。,“妈妈，我已经长大了，我要自己去钓鱼。”,“钓鱼的路上会遇到很多难题。因此，我要先考考你。“,40+20=,60-20=,1.,60,40,30+20,40+50,60,40,2,口算。,3+2,4+5,6,4,50,90,20,_+_=_,_+_=_,3.,40,43,40,30,70,“谢谢同学们帮助花花这么多难题都没有难住你们，看来，你们已经掌握了今天的知识。,花花邀请你们和它一起去钓鱼。,希望你们能钓到许多许多的鱼！不过，,你们可要牢牢的记住，只有得数等于,40,的路，才是回家的路！”,90,80,30,50,80,40,20+30,100,60,30,0,0+40,40,1,0,90,50,30+10,70,20,50,10,20+30,70,30,40+30,10+30,60,40,40,20+30,100,60,30,0,0+40,40,10,90,50,30+10,70,20,50,10,20+30,70,30,40+30,10+30,60,40,40,=40,=40,=40,=40,=40,=40,=40,=20,=50,=50,=70,=30,=50,=30,将,10,、,20,、,30,、,40,、,50,填在圆圈里，使每条直线上的三个数的和相等。,40,30,20,10,50,50,20,10,40,30,30,50,10,20,40,再见！,