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,*,连加连减,连加连减,口算：,1.,2,4=,6,2.,3,6=,9,4,4.,3,5=,8,5.,10,-,3=,7,0,7.,4,6=,10,3,9.,2,5=,7,4,6.,5,5=,8.,6,3=,10.,9,5=,3.,8,4=,口算：1.24=62.36=944.3,4,2,1,421,？,根,3,3,2,8,6,？根33286,4,3,3,7,1,0,433710,8,8,3,1,8,318,4,2,4,6,1,0,424610,9,9,9,9,9,9,9,2,4,3,7,9,924379,5+1+2=,6,8,3,0,6,8,5,2,8,10,6-3-3=,2+4+2=,10-5-3=,3+5+2=,8-2-3=,6,3,5+1+2=683068528106-3-3=2+4+2=1,？,个,3,4,2,9,7,？个34297,9,3,4,2,6,93426,9,3,4,2,3,4,2,9,93423429,写一写，算一算。,写一写，算一算。,