6-1=10-__ - 5 , 9 + 3=6+__ - 6 , 5 + 3=12-__ - 4, 6 - 2 =7-__ - 3 , 6 - 3=2+__ - 1, 10 + 10=18+__ - 2, 10 + 5=8+__ - 7,

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