jak bedzie dobrze i z obliczeniami daje naj  oblicz a/ 2^2 +3x(-2)+ = b/ (-3 1/2) X 3/5 - (-6 1/4) :2 = c/ (-1 1/2)^3 - 5X(1/8)+ = d/ (-2,5)X(-4)-4X(-15)+(-8+3)= objasnienie znaków X razy : podzielic 1/2 ułamek zwykły ^ potęga

a) 2² + 3 * (-2) = 4 - 6 = -2 b) (-3 1/2) * 3/5 - (-6 1/4):2 = (-7/2) * 3/5 - (-25/4):2 = -21/10 + 25/4 * 1/2 = -21/10 + 25/8 = = -84/40 + 125/40 = 41/40 = 1 1/40 c) (-1 1/2)³ - 5 * 1/8 = (-3/2)³ - 5/8 = -27/8 - 5/8 = -32/8 = -4 d) (-2,5) * (-4) - 4 * (-15) + (-8 + 3) = 10 + 60 + (-5) = 70 - 5 = 65