苏教版 一年级 数学 下册,1.3 练习一(2),3+9= 12-3= 12-9=,7+9= 16-7= 16-9=,12,9,3,16,9,7,复习旧知,11-9= 6+9 = 13-9= 9+4 = 18-9= 15-9= 16-9= 12-9= 14-9= 8+9 = 17-9= 9+7 =,6.,2,13,7,17,15,9,3,8,4,6,5,16,巩固练习,17-9+7= 8+7-9=,13-9+8= 18-9-9=,7.,12,9,4,0,8,15,15,6, = ,8.,有11支蜡烛,吹灭了9支,还有多少支亮着?, = ,9.,树上原来有13只猴,下来3只。树上还剩多少支?,小红做了12朵红花,小明做了9朵。小明至少还要做几朵,才能超过小红?, = ,课堂小结,这节课你们都学会了哪些知识?,1.平十减,2.破十减,3.想加算减,