Adding and Subtracting Scientific Notation Exit Ticket

What is the ONLY thing that matters when adding and subtracting numbers in scientific notation?

• That the exponents are different

• That the constants are the same

• That the exponents are the same

• That both constants are positive

Write your answer in 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

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

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

Write your answer in scientific notation.
(7.32 x 10⁶) - (4.01 x 10⁸)

• -3.937 x 10⁸
• 3.937 x 10⁸
• 3.937 x 10⁷
• 3.937 x ⁻²