整十数加、减整十数,执教：宋宁,6+4=,90里面有几个十,6个十是多少,10个十是多少,5+4=,8+2=,7-3=,50里面有几个十,9-3=,20,50,60,70,40,30,做加法,试一试，你准行！,50,60,70,80,90,80,50,60,70,40,30,做减法,试一试，你准行！,50,40,30,20,10,我们一起去钓鱼吧！,“钓鱼的路上会遇到很多难题。因此，我要先考考你。“,50,40,90,40,50,90,90,40,50,90,50,40,我回填！,50-10=,考考你的眼力,3+2 =,5,4,9,50,40,90,2+3+4=,20+30+40=,5-1=,30+20=,9-3+2 = 90-30+20 =,8,80,60,-10,+30,-70,40,+60,80,40,+20,-50,+30,+6,50,80,10,70,30,40,60,10,40,46,开火车！,20 + 20 = 40,我能行！,90,80,30,50,80,40,30+70-40=,60,80-50+7=,37,10+80+6=,96,20+30,10060,300,0+40,4010,9050,30+10,7020,5010,20+30,7030,40+30,10+30,6040,50+20,9060,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。,