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问题：2、7、8、11算24点用加减乘除四种运算符号把2、7、8、11算出得数24（每个数字不得重算或遗漏）有几种算法,都写出来啊··急啊···
答案：↓↓↓ 范波的回答： 网友采纳 1:(2脳7-11)脳8 2:((2脳7)-11)脳8 3:(2-8)脳(7-11) 4:2脳(8-7+11) 5:2脳((8-7)+11) 6:2脳(8-(7-11)) 7:2脳(8+11-7) 8:2脳((8+11)-7) 9:2脳(8+(11-7)) 10:2脳(11-7+8) 11:2脳((11-7)+8) 12:2脳(11-(7-8)) 13:2脳(11+8-7) 14:2脳((11+8)-7) 15:2脳(11+(8-7)) 16:7-2+8+11 17:(7-2)+8+11 18:(7-2+8)+11 19:((7-2)+8)+11 20:7-2+(8+11) 21:(7-2)+(8+11) 22:(7-(2-8))+11 23:7-(2-8)+11 24:7-(2-(8+11)) 25:7-(2-8-11) 26:7-((2-8)-11) 27:7-2+11+8 28:(7-2)+11+8 29:(7-2+11)+8 30:((7-2)+11)+8 31:7-2+(11+8) 32:(7-2)+(11+8) 33:(7-(2-11))+8 34:7-(2-11)+8 35:7-(2-(11+8)) 36:7-(2-11-8) 37:7-((2-11)-8) 38:(7脳2-11)脳8 39:((7脳2)-11)脳8 40:7+8-2+11 41:(7+8)-2+11 42:(7+8-2)+11 43:((7+8)-2)+11 44:(7+(8-2))+11 45:7+(8-2)+11 46:7+(8-2+11) 47:7+((8-2)+11) 48:7+(8-(2-11)) 49:7+8-(2-11) 50:(7+8)-(2-11) 51:7+8+11-2 52:(7+8)+11-2 53:(7+8+11)-2 54:((7+8)+11)-2 55:(7+(8+11))-2 56:7+(8+11)-2 57:7+(8+11-2) 58:7+((8+11)-2) 59:7+(8+(11-2)) 60:7+8+(11-2) 61:(7+8)+(11-2) 62:7+11-2+8 63:(7+11)-2+8 64:(7+11-2)+8 65:((7+11)-2)+8 66:(7+(11-2))+8 67:7+(11-2)+8 68:7+(11-2+8) 69:7+((11-2)+8) 70:7+(11-(2-8)) 71:7+11-(2-8) 72:(7+11)-(2-8) 73:(7-11)脳(2-8) 74:7+11+8-2 75:(7+11)+8-2 76:(7+11+8)-2 77:((7+11)+8)-2 78:(7+(11+8))-2 79:7+(11+8)-2 80:7+(11+8-2) 81:7+((11+8)-2) 82:7+(11+(8-2)) 83:7+11+(8-2) 84:(7+11)+(8-2) 85:8-2+7+11 86:(8-2)+7+11 87:(8-2+7)+11 88:((8-2)+7)+11 89:8-2+(7+11) 90:(8-2)+(7+11) 91:(8-(2-7))+11 92:8-(2-7)+11 93:8-(2-(7+11)) 94:8-(2-7-11) 95:8-((2-7)-11) 96:8脳(2脳7-11) 97:8脳((2脳7)-11) 98:8-2+11+7 99:(8-2)+11+7 100:(8-2+11)+7 101:((8-2)+11)+7 102:8-2+(11+7) 103:(8-2)+(11+7) 104:(8-(2-11))+7 105:8-(2-11)+7 106:8-(2-(11+7)) 107:8-(2-11-7) 108:8-((2-11)-7) 109:(8-2)脳(11-7) 110:8+7-2+11 111:(8+7)-2+11 112:(8+7-2)+11 113:((8+7)-2)+11 114:(8+(7-2))+11 115:8+(7-2)+11 116:8+(7-2+11) 117:8+((7-2)+11) 118:8+(7-(2-11)) 119:8+7-(2-11) 120:(8+7)-(2-11) 121:8脳(7脳2-11) 122:8脳((7脳2)-11) 123:8+7+11-2 124:(8+7)+11-2 125:(8+7+11)-2 126 | 
