a) P= 5*12 = 60
b) P = 5*5 = 25
c) P = (15+9):2 * 6 = 12*6 = 72
d) P = (6*8):2 = 24
e) P =
f) P = (4*3):2 = 6
g) P =
h) P = (5+8):2 * 3 = 6,5*3 = 19,5
i) P = 2*3 = 6
j) P = (6*8):2 = 24
