Question

1-calcule indicando o resultado em notacao cientifica
a)2.10^12 + 3.10^12
b)4.10^13 - 3.10^1
c)5.10^12 + 3.10^12
d)6,25.10^34
e)8,2.10^-5 - 5.10^-5
f)3.10^14 - 15.10^12​

Answer 1

a) 2 × 10¹² + 3 × 10¹²

⠀⠀(2 + 30) × 10¹²

⠀⠀32 × 10¹²

⠀⠀3.2 × 10¹³

b) 4 × 10¹³ - 3 × 10¹

⠀⠀4 × 10¹³ - 30

⠀⠀40000000000000 - 30

⠀⠀39999999999970

⠀⠀3.9999999999970 × 10¹³

c) 5 × 10¹² + 3 × 10¹²

⠀⠀(5 + 3) × 10¹²

⠀⠀8 × 10¹²

d) 6.25 × 10⁻³⁴ + 2.75 × 10⁻³⁴

⠀⠀(6.25 + 2.75) × 10⁻³⁴

⠀⠀9 × 10⁻³⁴

e) 8.2 × 10⁻⁵ - 5 × 10⁻⁵

⠀⠀(8.2 - 5) × 10⁻⁵

⠀⠀3.2 × 10⁻⁵

f) 3 × 10¹⁴ - 15 × 10¹²

⠀⠀(3 × 10²) × 10¹² - 15 × 10¹²

⠀⠀(3 × 10² - 15) × 10¹²

⠀⠀(300 - 15) × 10¹²

⠀⠀285 × 10¹²

⠀⠀2.85 × 10¹⁴

Espero Ter Ajudado !!