Question

Oblicz:

A)[2-1+(1/2)2-2-3] Razy 2 -1 =

B)0,8 – 5/13 razy 0,13) : (2/3)-3 =

C) 52 : 2,5 – [(3/4)-1razy(-1/2)2 + 1 i ½ : 2,25] razy 3/4=

D)[(-2)2-1,25 + 2,52 ] razy (-2/3)3 =

E) [(-4)2:1,6-6]-2 =

Answer 1

A. = [2-1+1-2-2] *2-1 = (-3) * 2 - 1 = -6-1 = -7
B. = (8/10 - 5/13 *13/100) : 2/3 - 3 = (8/10-1/20) :2/3-3 = (16/20-1/20):2/3-3 = 15/20*3/2-3 = 45/40-3

C. = 20,8 - [(3/4+1/2*2+1½ :2,25]*3/4 = 20,8 - [(3/4)+1+3/2*4/9] *3/4 = 20,8 - [3/4+1+2]*3/4 = 20,8-(15/4)*3/4 = 20,8-(15/4)*3/4 = 20,8 - 45/16

D. = [(-2)*2-1,25+2,52]*(-2/3)*3 = [-4+1,27]*(-2) = -2,73*(-2) = 5,46

E. = [-8:1,6-6]-2 = (-5-6)-2 = -11-2 = -13

Myślę, że to tak powinno być, pozdrawiam! :))