Question

Calcule o valor das expressões: a) (-2/3)³ + 1. b) 2 x √25 - √9/4. c) 3/5 + (-1/2) + (-1/10). d) 5- 1/2 + (+1/2)². e) (-1 +1/2) - (-1/6 + 2/3). f) (1/2 - 3/4) : ( 1- 2/5). g) [(-1/2)³ + 2 x (-1)⁴] : 1/2. h) -3/5 x [-6 + 2 : ( -1 + 1/2 ) ]

Answer 1

a)-8/27+1=-8+27/27=19/27
b)2.5-3/4=10-3/4=40-3/4=37/4
c)3/5-1/2-1/10=6-5-1/10=0/10=0
d)5-1/2+1/4=20-2+1/4=19/4
e)(-2+1/2)-(-1+4/6)=-1/2-3/6=-3-3/6=-6/6=-1
f)(2-3/4):(5-2/5)=(-1/4):(3/5)=-1/4.5/3== -5/12
g)[-1/8+2]:1/2=
[-1+16/8]:1/2=15/8:1/2=15/8.2=30/8=15/4
h)-3/5.[-6+2:(-2+1/2)]
-3/5.[-6+2:(-1/2)]
-3/5.[-6+2.(-2)]
-3/5.[-6-4]
-3/5.[-10]
=30/5
=6

Answer 2

a b nao vai ser assim

b)2.5-3/4=10-3/4=40-3/4=37/4

a raiz quadradra de 4 e 2

que vai ficar 37

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