2+7= 7-4= 6+4= 10-7= 3+6= 8+2= 5-5= 9-8= 10-9=3+3+3= 7+2-5= 9-2-2= 10-6+5= 9-3-5= 4+5-2= 5-2+7=9-4+3= 8-7+8= 5+4-1= 5-0+4= 9+1-7= 5-2+6= 6+1= = 6= (1)(2)(7)(8)9-6= 8-2= 3+7= 10-0= 4+6= 5+5= 9-1= 9+0= 8+2= 2+6+2= 10-4+3= 7-2+4= 8+2-6= 5+5-3= 10-1-4= 8-5=9-4-5= 9-5-2= 10-6-1= 3+4+3= 6+2+2= 5-3+6= 10-5= ?个10 个