Răspuns:
1/6
Explicație pas cu pas:
[(0,25+2/3)•0,75-3/20•5/4]:3 =
= [(³⁾1/4 + ⁴⁾2/3)•3/4 - 3•5/(20•4)] :3 =
= [(3/12+8/12)•3/4 - 15/80]:3 =
= (11/12 •3/4 - 3/16):3 =
= (33/48 - 3/16):3 =
= (11/16 - 3/16):3 =
= [(11-3)/16]:3 =
= 8/16 •1/3 = 1/2 • 1/3 = 1/6