84 - 51 = (80 + 4) - (50 + 1) = 80 - 50 + 4 - 1 = 30 + 3 = 3382 - 51 = (80 + 2) - (50 + 1) = 80 - 50 + 2 - 1 = 30 + 1 = 3175 - 63 = (70 + 5) - (60 + 3) = 70 - 60 + 5 - 3 = 10 + 2 = 1246 - 35 = (40 + 6) - (30 + 5) = 40 - 30 + 6 - 5 = 10 + 1 = 11584 - 371 = (500 + 80 + 4) - (300 + 70 + 1) = 500 - 300 + 80 - 70 + 4 - 1 = 200 + 10 + 3 = 213746 - 131 = (700 + 40 + 6) - (100 + 30 + 1) = 700 - 100 + 40 - 30 + 6 - 1 = 600 + 10 + 5 = 615
84 - 51 = (80 + 4) - (50 + 1) = 80 - 50 + 4 - 1 = 30 + 3 = 33
82 - 51 = (80 + 2) - (50 + 1) = 80 - 50 + 2 - 1 = 30 + 1 = 31
75 - 63 = (70 + 5) - (60 + 3) = 70 - 60 + 5 - 3 = 10 + 2 = 12
46 - 35 = (40 + 6) - (30 + 5) = 40 - 30 + 6 - 5 = 10 + 1 = 11
584 - 371 = (500 + 80 + 4) - (300 + 70 + 1) = 500 - 300 + 80 - 70 + 4 - 1 = 200 + 10 + 3 = 213
746 - 131 = (700 + 40 + 6) - (100 + 30 + 1) = 700 - 100 + 40 - 30 + 6 - 1 = 600 + 10 + 5 = 615