一、用直尺画竖式的 横线25+37= 91-49= 80-54= 48+36=66-47= 21+69= 75-20= 71+10= 75-50= 37-10= 50-40= 76-50=36+27+28= 93-35-19= 21-20+15=96-90+20= 37-10-20= 62+30-22=74-20+17= 92-20-48= 21+69+30=76-50= 12+10= 83-10= 81-30=16-10= 73-70= 63+10= 15+10=31-30= 96-20= 69-30= 98-40=48+25+8= 26+22+14= 61-28+25= 38+13+34= 50-34+18= 35-26-25= 54-25-56= 20+22-25= 62-22-14=72+10= 92-70= 44-30= 78-30=77-10= 79-20= 88-30= 62-30=79-10= 32+30= 80-70= 43+40=55-20-24= 65-25+26 = 75-55+56=22+22+14 = 77-46-72= 65-25-26 = 75-25-36= 12+26+27= 54-27-26=32-30= 93-70= 65-40= 36+10=97-70= 29+20= 63-40= 17+40= 99-10= 76-70= 88-50= 32+6=4+27-26= 57-27-21= 27-16+72 = 62-15+14= 75-25-35= 26+16+23=67-22-26= 70-27-25= 77-27-4 = 23+6= 64+5= 87+0= 67-7= 97+1= 59+1= 79-5= 77-2=63+5= 71+8= 57+6= 94+8= 40+12+23= 54+46-12 = 65-35+25= 95-50-22= 86-54-26= 54-25+26=70-27-23= 32+24+34= 66-26-22=16+6= 65+8= 98+8= 24+8= 84+9= 47+6= 89+9= 53+8= 65+6= 65+7= 48+8= 44+7= 66-46-20= 65-25-26= 44-23-12=56-54+26= 25+26+27 97-27-23=72-22-4= 76-54-16= 76+9+9=57+7= 72+9= 46+6= 56+9= 83-9= 17-8= 75-7= 20-9=57-9= 71-2= 90-2= 63-8= 85-6- 32= 42-7+9= 42+40-8= 46-9+70= 8+55-9= 80-3+30-1= 62-7-8= 64+12-31= 53+10-10=22-20= 84-70= 76-30= 92-20=65-20= 89-80= 87-20= 64+10= 18+50= 63-20= 87+10= 30-10=37+55-40= 62-30+80= 83-20-30=19+20+81= 83-70-20= 69-10+25=86-80+70= 43+20-10= 96-90+50=16+20= 56-20= 35+20= 90-80= 47-10= 82-10= 66-50= 47+20= 91-70= 19-10= 76-10= 18+70= 94-59-10= 74-50=39= 96-70+5= 98-40+3= 85+0-23= 83+3-8=56-10-6= 16-10+57= 83-40+1=99-50= 82+6= 18-8= 61+2= 59-0= 18+3= 17+4= 15+6= 99+6= 14+9= 45+6= 29+3= 29+7+85= 38+8+7= 99+5-19=98+4+7= 88-26+8= 98+6+4= 72+9-38= 49+3+5= 75+7-48=
