Răspuns:
Explicație pas cu pas:
a) b) c) sunt il cealalta postare
d)
(2 - 39/20)*(-5) + (-1/2 + 8/9)*(3/2)
= (40/20 - 39/20)*(-5) + (-9/18 + 16/18)*3/2
= -1/20*(-5) + 7/18*3/2 = 5/20 + 7/12 = 1/4 + 7/12 = 3/12 + 7/12 = 10/12 = 5/6
e)
7/3 *6 - 5*(1/2 : 1/5 - 19*3/38)
= 14 - 5*(1/2*5/1 - 3/2) = 14 - 5*(5/2 - 3/2) = 14 - 5*2/2 = 14 - 5 = 9
f)
[(-1/2)^0 - (-1/2)^2 + (-1/2)^3 - (-1/2)^4] : (-0,0625)
= (1 - 1/4 - 1/8 - 1/16) : (-0,0625)
= (16/16 - 4/16 - 2/16 - 1/16) : (-0,0625)
= 9/16 : (-625/10000) = 9/16 : (- 25/400) = 9/16 : (-1/16) = 9/16 * (-16/1) = -9
g)
(5/3)^-10 : (5/3)^-11 + (3/4)^-1
= (3/5)^10 : (3/5)^11 + 4/3
= (3/5)^-1 + 4/3 = 5/3 + 4/3 = 9/3 = 3
