1,2,3,4,5,6,7,8,2,9,1,6,3,10,加减混合并不难，从左向右依次算。加法在前先算加，减法在前先算减。,儿歌：,1+4+5=,5,10,10-4-4=,6,2,2+7+0=,9,9,7-6+5=,1,6,8-1-3=,7,4,2+6-7=,8,1,从图中你知道了什么？你能提出一个问题吗？,池塘里原来有6只小鸭，来了3只，又走了4只，现在池塘里有几只小鸭？,634,9,5,你能用个式子表示出来吗？,( )+( )( )=( ),3,4,2,5,7,8,-,+,3,2,7,1,2,3,4,5,6,7,8,2,3,4,5,6,7,8,5+4-1,2,3,4,5,6,7,8,6-3+2,3,4,5,6,7,8,3,4,5,6,7,8,5+3+2,4,5,6,7,8,4,5,6,7,8,7+3-10,5,6,7,8,10-9+1,6,7,8,6,7,8,0+9-3,7,8,7,8,4+3-7,8,8,4+4+1,（ ）+ 3 - 5=1（）- 4 + 2=5,考考你,3,7,
