2 x 1010 x 8 x 103 =
-5 x 10-4 x 4 x 105 =
4 x 10-7 x ( -3 x 10-2) =
4 x 10-2 x 6 x 103 =
1,5 x 104 : 5 x 103 =
3 x 107 : 3 x 10-2 =
(-2 x 102)4 =
(7 x 10-6)2
1,2 x 10-3 + 3 x 10-3 =
3 x 104 + 1,0 x 104 =
1,2 x 10-3 - 3 x 10-3 =
3 x 104 - 1,0 x 104 =
2 x 105 - 1,0 x 104 =
5 x 10-2 + 1,0 x 10-4 =
7,8 x 103 + 1,2 x 104 =
Soluções para a tarefa
Resposta:
Em cada letra.
(Todas)
Explicação:
a)
= 2 x 10^10 x 8 x 10^3
= 16. 10^13
= 1,6 . 10 . 10^13
= 1,6 . 10^14
R.: 1,6.10^14
______________
b)
= -5 x 10-4 x 4 x 10^5
= - 20 . 10^1
= - 2.10^1 . 10^1
= - 2 . 10^2
R.: - 2. 10^2
_________________
c)
= 4 x 10^(-7) x [ -3 x 10^(-2) ]
= (-3).4 . 10^(-7). 10(-2)
= - 12 . 10^(-9)
= - 1,2. 10 . 10^(-9)
= - 1,2 . 10^(-8)
R.: - 1,2 . 10^(-8)
______________
d)
= 4 x 10^(-2) x 6 x 10^3
=24 . 10^1
= 2,4 . 10^1 . 10^1
= 2,4 . 10^2
R.: 2,4 . 10^2
______________
e)
= 1,5 x 10^4 : 5 x 10^3
= 15.10^(-1). 10^4 : 5 . 10^3
= 15.10^3 : 5 . 10^3
= 3
R.: 3
_______________
f)
= 3 x 10^ 7 : 3 x 10^(-2)
= 1 . 10^7 . 10^2
= 1 . 10^9
R.: 1 . 10^9
__________
g)
= (-2 x 10^2)^4
= (-2)^4 . (10^2)^4
= 16 . 10^8
= 1,6 . 10^(-1). 10^8
= 1,6 . 10^7
R.: 1,6. 10^7
_______________
h)
= [(7 x 10^(-6)]^2
=7^2 . [10^(-6)]^2
= 49 . 10^(-12)
= 4,9 . 10 . 10^(-12)
= 4,9 . 10^(-11)
R.: 4,9 . 10^ (-11)
_______________
i)
= 1,2 x 10^(-3) + 3 x 10^(-3)
= 10^(-3) . (1,2 + 3)
= 4,2 . 10^(-3)
Ou
= 0,0012 + 0,0030
= 0,0042
= 4,2 . 10^(-3)
R.: 4,2 . 10^(-3)
__________________
J)
= 3 x 10^4 + 1,0 x 10^4
= (3+1). 10^4
= 4. 10^4
R.: 4. 10^4
_____________
L)
= 1,2 x 10^(-3) - 3 x 10^(-3)
= 10^(-3) . (1,2 - 3,0)
= - 1,8 . 10^(-3)
R.: - 1,8 . 10 ^ (-3)
______________
M)
= 3 x 10^4 - 1,0 x 10^4
= (3-1). 10^4
= 2. 10^4
R.: 2. 10^4
__________
N)
= 2 x 10^5 - 1,0 x 10^4
= 20. 10^(-1) . 10^5 - 1. 10^4
= 20. 10^4 - 1. 10^4
= 19. 10^4
= 1,9 . 10 . 10^4
= 1,9 . 10^5
R.: 1,9 . 10^5
____________
O)
= 5 x 10^(-2) + 1,0 x 10^(-4)
= 0,0500 + 0,0001
= 0,0501
= 5,01.10^(-2)
R.: 5,01 . 10^(-2)
-------------------
0,0500
0,0001
-------------
0,0501
______________
P)
= 7,8 x 10^3 + 1,2 x 10^4
= 7800 + 12000
= 12000 + 7800
= 19800
= 1,98.10^4
R.: 1,98.10^4