Add and Subtract in Scientific Notation

Write the answer in scientific notation.
4.1 x 10⁵ +   5.5 x 10⁶  =

• 5.91 x 10⁶
• 9.6 x 10⁵
• 9.6 x 10¹¹
• 4.65 x 10⁵

(2.8 x 10⁸)+(5.4 x 10⁹)

• 5.68 x 10⁹
• 5.69 x 10⁹
• 5.67 x 10⁹
• 5.70 x 10⁹

(7.2 x 10⁶)-(3.4x 10⁶)

• 3.8x10⁶
• 7.7x10⁶
• 3.7x 10⁶
• 3.9x10⁶

Subtract the within the scientific notation. 
(2 x 10³) - (1.9 x 10²)

• 1.81 x 10⁵
• 1.81 x 10³
• 1.81 x 10⁶
• 1.81 x 10⁴

(3.5 x 10^4)+(4.7 x10^4)

• 1.5 x 10^4
• 6.2 x 10^4
• 8.2 x 10^4
• 4.5 x 10^4

Add using scientific notation.
(5.2 x 10⁷) + (3.01 x 10⁴)

• 5.20301 x 10¹¹
• .520301 x 10⁷
• 5.20301 x 10⁷
• 5.20301 x 10⁸

Subtract using scientific notation. 
(2 x 10³) - (1.9 x 10²)

• 1.81 x 10⁵
• 1.81 x 10³
• 1.81 x 10⁶
• 1.81 x 10⁴

(9.9x 10^2)-(2.2x10^2)

• 7.6 x 10^2
• 7.7 x 10^2
• 7.8 x 10^2
• 7.9 x 10^2

Subtract using scientific notation.
(8.0 x 10¹³) - (7.5 x 10¹²)

• 7.25 x 10¹³
• 7.25 x 10¹²
• 5.0 x 10¹²
• 5.0 x 10¹³

Write the answer in scientific notation.
7.3 x 10⁵  +   3.7 x 10⁵  =

• 11.0 x 10⁵
• 1.1 x 10¹⁰
• 1.10 x 10¹¹
• 1.1 x 10 ⁶