Resolva as subtrações. a) 7, 5, 5, 3, 2, 3, 0 b) 7, 5, 5, 3, 2, 3, 11 c) 11, 9, 8, 6, 10, 7, 3

a) 7 - 5 = 2; 5 - 5 = 0; 3 - 2 = 1; 2 - 3 = -1; 3 - 0 = 3; b) 11 - 7 = 4; 9 - 5 = 4; 8 - 5 = 3; 6 - 3 = 3; 10 - 2 = 8; 7 - 3 = 4; 11 - 11 = 0; c) 11 - 9 = 2; 9 - 8 = 1; 8 - 6 = 2; 6 - 10 = -4; 10 - 7 = 3; 7 - 3 = 4.