6 8 10 9 73 5 6 7 23+3= 5+3= 6+4= 7+2= 2+5= 3+5= 4+6= 2+7= 5+2=6-3= 8-3= 10-4= 9-2= 7-2= 8-5= 10-6= 9-7= 7-5=8 9 9 8 63 5 6 7 23+5= 5+4= 6+3= 7+1= 2+4=5+3= 4+5= 3+6= 1+7= 4+2=8-3= 9-5= 9-3= 8-7= 6-2=8-5= 9-4= 9-6= 8-1= 6-5=5 7 8 8 93 5 6 7 23+2= 5+2= 6+2= 7+1= 2+7=2+3= 2+5= 2+6= 1+7= 7+2=5-3= 7-5= 8-6= 8-7= 9-2=5-2= 7-2= 8-2= 8-1= 9-7=