Please answer the subtration problems below. Click SUBMIT when finished.
11	-	10	=			12	-	7	=
10	-	7	=			11	-	1	=
9	-	9	=			6	-	3	=
9	-	2	=			9	-	5	=
8	-	4	=			6	-	5	=
12	-	9	=			9	-	7	=
12	-	11	=			9	-	4	=
4	-	2	=			6	-	3	=
10	-	7	=			3	-	3	=
8	-	5	=			6	-	1	=