共715种组合,149种无解。有解比例:79.16%,无解比例:20.84%。全部组合列出如下:
1 1 1 1: no answer!
1 1 1 2: no answer!
1 1 1 3: no answer!
1 1 1 4: no answer!
1 1 1 5: no answer!
1 1 1 6: no answer!
1 1 1 7: no answer!
1 1 1 8: ((1+(1+1))*8)=24
1 1 1 9: no answer!
1 1 1 10: no answer!
1 1 2 2: no answer!
1 1 2 3: no answer!
1 1 2 4: no answer!
1 1 2 5: no answer!
1 1 2 6: ((1+(1+2))*6)=24
1 1 2 7: ((1+2)*(1+7))=24
1 1 2 8: ((1*(1+2))*8)=24
1 1 2 9: ((1+2)*(9-1))=24
1 1 2 10: ((1+(1+10))*2)=24
1 1 3 3: no answer!
1 1 3 4: ((3*(1+1))*4)=24
1 1 3 5: ((1+3)*(1+5))=24
1 1 3 6: ((1*(1+3))*6)=24
1 1 3 7: ((1*(1+7))*3)=24
1 1 3 8: ((1-(1-3))*8)=24
1 1 3 9: ((1*(9-1))*3)=24
1 1 3 10: ((10-(1+1))*3)=24
1 1 4 4: ((1+(1+4))*4)=24
1 1 4 5: ((1*(1+5))*4)=24
1 1 4 6: ((1-(1-4))*6)=24
1 1 4 7: ((1*(7-1))*4)=24
1 1 4 8: ((1*(4-1))*8)=24
1 1 4 9: ((1-4)*(1-9))=24
1 1 4 10: ((10*(1+1))+4)=24
1 1 5 5: ((1*(5*5))-1)=24
1 1 5 6: (