Question

1) efetue as multiplicações e as divisões:
a)(5x10^3)x(3x10^4)=
b)(5,3x10^2)x(3,1x10^-7)=
c)(2,57x10^-17)x(5,32x10^35)=
d)(6,2x10^3) : (5,1x10^-6)=
e)(1,147x10^23) : (3,7x10^-31)=​

Answer 1

Resposta:

Explicação passo-a-passo:

a)  (5.10³ x 3.10^4) =

(5.3).10^3+4 =

15.10^7 =

1,5.10^7+1 =

1,5.10^8

b)  (5,3.10² x 3,1.10^-7) =

(5,3 x 3,1).10^2+(-7) =

16,43.10^-5 =

1,643.10^-5+1 =

1,643.10^-4

c)  (2,57.10^-17 x 5,32.10^35) =

(2,57 x 5,32).10^-17+35 =

13,6724.10^18 =

1,36724.10^18+1 =

1,36724.10^19

d)  (6,2.10³ : 5,1.10^-6) =

(6,2 : 5,1).10^3-(-6) =

1,22.10^3+6 =

1,22.10^9

e)  (1,147.10^23 : 3,7.10^-31) =

(1,147 : 3,7).10^23-(-31) =

0,31.10^23+31 =

0,31.10^54 =

3,1.10^54-1 =

3,1.10^53