100 以内的加减法竖式计算: 87-78-7= 18+8+36= 42-10-7= 37+5-9= 19-5+12= 66-10-30= 47+30-7= 77-70+7= 80+7-17= 45+5+10= 90-38+10= 32+8+12= 67-30+6= 4+27+26= 30+13+8= 39-9+30= 39+9-30= 80+7-17= 68-10-30= 43+7+10= 36+4+16= 87-30+6= 48-15-5= 4+27+26= 60+16+6= 54+9-20= 90-50-10= 47-7+20= 47+7-20= 27+5-19= 49-5+12= 8+8+30= 42-10-7= 60-10-30= 45+5+10= 90-30+10= 47+30-7= 77-70+7= 80+7-17= 39-9+30= 39+9-30= 32+8+12= 67-30+6= 54+9-20= 44-15-5= 4+27+26= 30+13+8= 69-5+15= 8+7+26= 27+6-29= 24-10+17= 87-80-7= 87-80+7= 80+7-17= 70+10-29= 43+7+10= 36+4+16= 87-30+6= 48-15-5= 4+27+26= 60+16+6= 54+9-20= 90-50-10= 47-7+20= 47+7-20= 5+8+30= 47-10-7= 70-16-30= 55+5+10= 80-30+10= 44+20-4= 77-70+7= 80+5-15= 39-9+30= 38+8-30= 33+7+13= 87-30+6= 54+9-20= 44-15-5= 14+27+36= 50-15+5= 17+6-8= 27-2+15= 38+7+40= 64-20-7= 60+28-30= 73