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2014-09-20T11:03:39+02:00
A = 7 x (9 - 4) + (15 - 8) x 6
A = 7 x (5) + (7) x 6
A = 35 + 42
A = 77

B = (8 + 4 x 7) : (15 - 9) + 10 - 8 - 8
B = (8 + 28) : (6) + 10 - 16
B = 36 : 6 - 6
B = 6 - 6
B = 0

C = 20 + 3 x 7 - 6 x (12 - 8)
C = 20 + 21 - 6 x (4)
C = 41 - 24
C = 17