文档介绍：6+5= 55-50= 30+3= 26-6= 8+3= 24-4= 7+70= 2+80= 12-7= 30+2= 50+50= 20+30= 98-40= 66-6= 80-30= 60+10= 70+30 -40= 43-3+20= 100-50-10= 40+2= 18-9= 3+42= 19-6= 7+27= 38-8= 12+6= 45+60= 90-20= 48-8= 82+3= 8+30= 4+24= 30+8= 50-20= 15-9-3= 9+7-8= 14-7+8= 10-5+5= 2+5+9= 70-20+9= 90+7-60= 10+2-3= 88-8-80= 13-9= 16-9= 15-9= 17-9= 12-9= 18-9= 11-9= 14-9= 17-9= 16-9= 19-9= 9+6= 8+9= 14-9+7= 15-9-5= 6+7-9= 13-9+8= 17-9= 5+9= 9+8= 3+9= 9+6= 14-9= 17-9= 7+5= 8+4= 8+8= 12-7= 12-8= 16-8= 14-7= 17-8= 13-7= 12-8= 16-7= 15-8= 17-7= 11-7= 13-8= 18-8= 11-8= 12-7= 13-7= 12-8= 11-9= 4+2= 8-3= 3+6= 9-4= 40+20= 80-30= 30+60= 90-40= 10+3= 7+30= 5+70= 2+10= 30+7= 70+5= 12-2= 37-7= 75-5= 12-10= 37-30= 75-70= 70+4= 46-6= 33-30= 17-7= 58-50= 9+60= 20+5= 50+1= 30+5= 30+6= 70+3= 21+70= 46+20= 30+14= 21+7= 46+2= 3+14= 41+7= 30+28= 46+2= 46+20= 3+55= 53+5= 46+3= 6+62= 19+70= 4+32= 50+49= 63+6= 30+28= 40+12= 45+4= 33+40= 56+30= 3+34= 38+20= 20+38= 3+56= 20+78= 25+30= 25+30= 25+3= 31+23= 54-30= 68-40= 93-20= 39-20= 77-40= 67-30= 68-20= 48-3= 59-30= 69-40= 75-3= 75+3= 26-4= 85-70= 46-6= 73-50= 87-4= 99-7= 56-3= 72-20= 27-7= 95-70= 44-30= 58-40= 48-3= 48-30= 57-6= 47-6= 59-30= 69-40= 75-3= 75+4= 56-30= 34-3= 87-6= 74-2= 78-60= 34-30= 78-6= 74+2= 75-3= 88-5= 56-4= 89-7= 46-20= 69-40= 47-3= 38-7= 84-4= 63-60= 49-4= 94-70= 39-3= 71-30= 57-30= 49-5= 97-60= 47-3= 78-20= 47-5= 48-5= 32-30= 65-4= 53-50= 68-5= 47-4= 74-20= 86-5= 74-3= 75-30= 68-50= 47-30= 75-40= 86-50= 74-30= 74-50= 57-30= 28-6= 47-3= 98-20= 89-60= 39-8= 43-30= 38-20= 12+45= 36+23= 87+35= 65+24= 42+40= 78+35= 64+32= 32+53= 67-42= 68-5= 4+23= 35+42= 43+54= 67-37= 78-46= 45+32= 76-56= 74-30= 35-32= 38-7= 26+63= 69-7= 5+74= 63-41= 54-42= 38-11= 75+4= 46+30= 20+69= 75-4= 46-30= 69-20= 32+37= 4+65= 57-35= 88-63= 58+20= 78-5= 87-40= 76-3= 76-30= 4+35= 35+4= 42+40= 3+56= 24+8= 36+5= 6+4= 5+8= 9+7= 26+4= 5+38= 9+17= 46+4= 5+48= 9+37= 8+35= 14+6= 35+3= 2+46= 24+4= 35+5= 4+46= 26+3= 35+7= 6+46= 28+4= 36+5= 47+2= 7+52= 36+50= 47+7= 7+25= 37+8= 63+6= 4+58= 2