9-8= __7-3= __
4-4= __4-0= __
7-7= __6-2= __
2-1= __9-7= __
4-1= __8-2= __
2-2= __9-1= __
8-7= __8-6= __
9-7= __7-2= __
9-7= __6-5= __
2-2= __4-1= __
9-9= __9-5= __
4-0= __2-1= __