Hallo biß,
a)
(√4)-3 + 12/6 * 3/2 = 2-3 + 2 * 3/2 = 1/23 + 3 = 1/8 + 3 = 25/8
b)
(-3)-4 * 2/3 = 1 / (-3)4 * 2/3 = 1/81 * 2/3 = 2 / 243
c)
5-2 * -5/2 + -3/20 = 1/52 * (-5)/2 - 3/20 = 1/5 * -1/2 - 3/20 = -1/10 - 3/20
= -2/20 - 3/20 = -5/20 = -1/4
Gruß Wolfgang