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,*,加法和减法,加法和减法,1,-,=,7,2,5,-=725,2,+,=,5,3,8,+=538,3,+,=,-,7,2,3,8,5,按从左往右的次序算。,+=-72385按从左往右的次序算。,4,+,=,-,7,2,3,8,+=-7238,5,+,=,4,2,6,+=426,6,-,=,8,3,5,-=835,7,-,=,+,6,2,3,5,-=+6235,8,+,=,5,2,3,6,+=5236,9,智慧城堡,加油啊！,智慧城堡加油啊！,10,4,+,3,-,2,=,5,4+3-2=5,11,4,+,2,-,3,=,5,4+2-3=5,12,看谁做得快！,10-4+2=,2+6+1=,8-3-5=,4+2+1=,7-2+4=,6-3-1=,9-2-1=,3+2-4=,6+3-3=,8,9,0,7,9,2,6,1,6,看谁做得快！10-4+2=4+2+1=9-2-1=87,13,5+2,-,=3,2+-6=1,93+=8,86+=5,4,5,2,3,调皮小虎藏起了几？,5+2-=32+-6=193+=886,14,看图，你能写出几个算式?,1,2,4,看图，你能写出几个算式?124,15,谢 谢,谢 谢,16,http:/