单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,8,、,9,的加减法,复习旧知,水果后面藏着几？,2,8,6,6,9,3,5,9,4,3,8,5,7,9,2,你是怎样计算的？,看图你能列出哪些算式？,5,3,8,5,3,3,5,8,3,5,8,5,3,8,8,你是想几的组成来,帮助计算的？,看图你能列出两道加法算式,和两道减法算式吗？,5,4,9,9,5,4,4,5,9,9,4,5,9,5,4,6,2,8,你们会填吗？,填一填。,8,6,2,2,6,8,2,8,6,8,6,2,你是怎样想的？,快来填一填，并把你的,想法告诉大家吧！,6,3,9,3,6,9,3,9,6,9,6,3,填一填。,9,6,3,8,4,4,4,8,4,想一想。,可以想：,8,4,4,8,8,7,1,9,9,7,2,9,9,8,1,1.,第,1,盆,7,朵,第,2,盆,3,朵,第,3,盆,2,朵,第,4,盆,6,朵,第,5,盆,1,朵,第,6,盆,4,朵,第,7,盆,8,朵,第,8,盆,5,朵,1,5,1,3,2,8,2,4,5,7,6,8,3,4,第,5,题,1,1,2,2,3,7,7,6,6,5,8,5,3,4,4,第,5,题,1,1,2,2,3,8,8,7,7,6,3,6,9,4,5,5,4,9,5,9,5,5,4,8,6,8,6,6,2,1+7=8,3+5=8,4+4=8,2+6=8,1+8=9,2+7=9,3+6=9,4+5=9,0+8=8,0+9=9,4,6,8,1,3,5,7,0,2,7,9,0,2,4,6,8,1,5,3,8.,3,+,5,=,8,9,-,8,=,1,2,+,7,=,9,7,4,2,9,9,3,6,6,8,1,9,1,4,4,5,6,7,6,7,8,9,2,2,2,5,7,2,6,8,2,7,9,3,5,5,3,6,9,+,=,4,5,9,+,=,7,2,5,7,3,4,7,1,6,7,0,7,8,_,0,=,8,8,_,1,=,7,9,_,4,=,5,