[(0.5+0.5)+(0.5+0.5)]/0.5=4(0.5+0.5+0.5)/0.5/0.5=6 (0.5+0.5)/0.5/0.5/0.5=8
[0.5 + 0.5 + 0.5 + 0.5] / 0.5 = 4 [0.5 + 0.5 + 0.5] / 0.5 / 0.5 = 6 [0.5 + 0.5] / 0.5 / 0.5 / 0.5 = 8