文档介绍：26-31+21= 4-0+88= 43-54+36= 38-21+2= 48-53+49= 65-13+3= 58-22+0= 73-20+13= 57+42-18= 78+11-19= 83-84+2= 64+10-70= 67-38+13= 71-58+15= 49-37+32= 30+44-66= 15+55-69= 3-79+77= 16+37-16= 50-54+46= 2+97-81= 74+19-84= 24+58-54= 35+49-11= 15+4-8= 22-16+12= 81+5-15= 65-37+29= 28-42+40= 56-35+29= 38-37+20= 4+87-86= 22+64-0= 34+47-52= 56+33-48= 31+24-26= 17+53-24= 19-13+1= 31+52-43= 76-46+4= 85-48+6= 46+46-55= 84-17+12= 52-32+40= 29+38-36= 75+2-38= 15-4+33= 77-9+22= 26+35-56= 45-84+41= 23-17-5= 19-12+45= 38+32+14= 66+29-4= 49-44+36= 77+12+1= 73+17-42= 30-25-3= 18+1+1= 84-3+17= 55-33-9= 52+17-10= 91-46-41= 52-23-21= 59+38-56= 72-28+1= 68+28+2= 93-25+30= 33-9-8= 10+81-23= 25+66+7= 22+29-23= 55-18-13= 4-0+75= 7-6-0= 34-30+19= 73+3-0= 61+3+4= 87+3+8= 62+8+5= 6-0+17= 68-19-7= 53+25+10= 38-3-11= 58-11+44= 13-9-2= 73+0+22= 51-26-22= 48+10+10= 1-0-0= 76-39-26= 32+53+6= 11-9-0= 77+22-65= 69-56-1= 41-12+25= 88+4+3= 4-2+36= 37+7-6= 7+34+25= 68+4-40= 42-18+10= 21-0+64= 47-21+16= 27+22-23= 58-38+1= 71-47+23= 35-13+17= 41-39+7= 53+46-82= 79-79+18= 77-3+14= 65-62+13= 69+4-65= 17+35-26= 42+39-16= 58+15-63= 34+49-72= 41+25-46= 73-27+6= 63-64+4= 50-0+5= 54-72+31= 78+10-13= 28+54-34= 58-41+28= 44+3-28= 29+20-4= 64-14+11= 72-69+18= 54-27+38= 63-11+26= 85-44+11= 60-28+4= 36-44+32= 55-43+42= 89+2-41= 47+6-8= 7+10-13= 70+17-56= 68+26-15= 43+6-20= 26-27+11= 42+35-69= 52+44-53= 27-33+30= 25+72-61= 52-16+5= 67+17