Nomor empat ya tolong.... CARANYA JUGA YA KAWAN...;-)

(√25³)^-1/3  = (√5^6)^-1/3 = 5^(6/2)(-1/3) = 5^-1

(4√16³)^-1/3 = (4√2^12)^-1/3 = 2^(12/4)(-1/3) = 2^-1


1/5 - 1/2 = (2-5)/10 = -0,3