39. a ) -8 b) + 81 c) +144 d) - 117 649 e) - 1 f) + 1 g)-1 h)-1 i) -125 40 . a) (-2)³ -(-5)° +(-3)⁴ = -8+1 + 81 = 73 b) (-3)³+(-1)°-(-2)²+(-5)²= -27 -1 -4+25 = -32-25 = - 7 c) 4³:(-2)³+(-1)³= 4³:(-8) -3 = 64:(-8) -3 =-8-3 = -11 d)(-5²)+(-5)² +(-2⁴)= -25 +25 +16 = 16 e)(-8²)+(-4)²-(-10)= -64+16 +10 = -38

39) a) (-2)³=-8 b)(-3)⁴=81 c)(-12)²=144 d)(-7)^0=1 e)(-1)⁴³=-1 f)(-1)^28=1 g)-1^25=-1 h)-1^68=1 i)(-5)³=-75 40) a) -8-1+81=72 b)-27+1-4+25=-5 c)64:(-8)-1=-8-1=-9 d)-25+25-16=-16 e)-64+16+10=-38