和几的进位加法,与相应的退位减法,沙河镇第二中心小学 李加花,5+8=,8+9=,8+3=,4+8=,8+7=,6+8=,2+8=,8+5=,7+8=,8+4=,13,17,11,12,15,14,10,13,15,12,8+（ ）=12,3+（ ）=11,5+（ ）=13,8+（ ）=15,8,8,11-9=,11-2=,例,例,试一试：,8+（ ）=12,12 8 =,6+（ ）=14,14 6 =,1、,4,4,8,8,2、,15 8 =,7,15 7 =,8,13 8 =,5,13 5 =,8,12 8 =,4,12 4 =,8,14 8 =,6,14 6 =,8,-8=,12,13,14,11,4,5,6,3,-,12,13,14,11,4,5,6,3,=,8,8,8,8,3、,4、,15-8=,13-5=,11-3=,16-8=,14-8=,15-7=,12-4=,17-8=,7,8,8,8,6,8,8,9,
