文档介绍：12+6= 23+5= 18-2= 30-2= 53+5= 40+6= 50-4= 35-10= 71+5= 87-10= 64+3= 83+10= 15-3= 73+4= 48-30= 76+10= 43-8= 41-2= 56-20= 71-6= 69-10= 65-8= 96-2= 18-2= 78+10= 63+3= 30+8= 52-3= 18+5= 15-3= 7 3+4= 48-30= 76+10= 43-8= 41-2= 39-2= 8+50= 63+3= 60+8= 35-10= 3+40=
29-7= 37+1= 30+8= 72-2= 35+2= 62+7= 11+2= 71+9= 60-5= 80-6= 98-4= 10+8= 30-3= 25+4= 95-40= 70+30= 68-9= 38-9= 88-9= 58-10= 63-5= 99-9= 24-9= 38-8= 82-5= 84-2= 60-7= 71+9= 70-5= 30-3= 25+4= 95-40= 70+30= 68-9= 38-9= 20-9= 20-1= 34-2= 80-7= 71+9= 15+4=
33+2= 29-3= 43+1= 66-4= 39-4= 89-5= 53-3= 8-4= 36+3= 11+9= 25+7= 56+20= 32+6= 43+5= 81-2= 48-9= 40-2= 50-8= 75-9= 47-8= 80-2= 72-2= 40-2= 35+5= 64+6= 60-4= 25+4= 88-4= 56+20= 32+6= 43+5= 81-2= 48-9= 40-2= 30-2= 53+5= 40+6= 50-4= 32+4= 12+6= 23+5=
3+40= 38-3= 86+2= 39-2= 8+50= 63+3= 32+4= 66+10= 58+30= 80-3= 62-2= 64+6= 29-7= 87+10= 60+8= 47-8= 27-9= 63-9= 92-3= 26-7= 36-9= 45-9= 46-9= 85+2= 32+7= 11+20= 36-5= 76+0= 64+6= 29-7= 87+10= 60+8= 47-8= 27-9= 72-2= 35+2= 62+7= 11+2= 26-5= 29-7= 37+1=
15+4= 15-4= 70+3= 20-9= 20-1= 34-2= 84+4= 83-3= 28-7= 95-4= 83+5= 65+3= 35+2= 3 9-3= 39+10= 52-4= 32-4= 37-8= 42-7= 52-3= 78-4= 86-8= 43-4= 59-4= 49-5= 45-3= 84+4= 93-3= 65+3= 35+2= 3 9-3= 39+10= 52-4= 32-4= 66-4= 39-4= 89-5= 53-3= 84+4= 33+2= 29-3=
38-3= 15-4= 18-2= 30+8= 43+1= 86+2= 70+3= 30-2= 72 -2= 66-4= 39-2= 20-9= 53+5= 35+2= 39-4= 8+50= 20- 1= 16+9= 5+18= 17+3= 36+6= 29+5= 87+9