Correct: 10-7=3, 10-4=6, 10-5=5, 5-2=3, 8-2=6, 5-1=4, 7-5=2, 9-6=3, 9-3=6, 9-5=4, 8-4=4, 8-5=3, 9-2=7, 10-9=1, 7-7=0, 10-1=9, Incorrect: 10-7=5, 10-4=8, 10-5=3, 5-4=3, 8-2=3, 5-4=8, 7-5=9, 9-6=4, 9-3=5, 9-5=3, 9-4=4, 8-5=1, 9-2=5, 10-7=1, 10-3=3, 10-1=3,

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