8、9的加减法65813609338436466+2=62+6=8-=8-=886225+3=8 8-5=33+5=8 8-3=51 +7 =8 8 -1 =77 +1 =8 8 -7 =12 +6 =8 8 -2 =66 +2 =8 8 -6 =23 +5 =8 8 -3 =55 +3 =8 8 -5 =34 +4 =8 8 -4 =4记住这4个算式我就会说出其他几个算式？767765765576556765567765567 8188118811+8=9 9-1=88+1=9 9-8=12+7=9 9-2=77+2=9 9-7=23+6=9 9 3=66+3=9 9 6=34+5=9 9 4=55+4=9 9 5=4
