Question

me ajudem por favor

1) Calcule os seguintes quocientes:

a) 2/3 : 3/4

b) 5/4 : 2/7

c) 3/7 : 1/2

d) 5/9 : 2

e) 3/4 : 3/5

f) 2/9 : 2/7

g) 64/27 : 128/81

h) 14/3 : ²1/3

i) 81/5 : 27/25

2) Qual o valor das expressões abaixo:

a) 0,8 - (2/5)² x 3 : (¹1/3)

b) 2 : (1/5 + 2/5)

3) Calcule as potências:

a) (2/3)⁴

b) (-1/3)³

c) (-0,2)²

d) (-3/6)³

e) (-1/4)5

f) 0¹

g) (-3/8)0

4) Reduza a uma só potência:

a) (2/3)5 • (-2/3)²

b) (-1/2)⁴ • (1/2)² • (1/2)

c) (2,1)6 : (2,1)⁴

d) (-2,4)⁴ : (-2,4)

e) [(0,3)²]³

f) [(2/7)2]³

Answer 1

1
a)2/3:3/4=2/3×4/3=8/9
b)5/4×7/2=35/8
c)3/7×2/1=6/7
d)5/9×1/2=5/18
faça assim para as outras alíneas
2
a)0.8-(2/5)^2×3:1/3
=0.8-4/25×3×3/1
=0.8-4/25×9
=0.8-36/25
=20-36/25
=-16/25
3
a)=16/72
b)-1/27
4
a)-2/3^5+2=-2/3^7