Addition and Subtraction with Scientific Notation Answers

A human hair was measured to have a diameter of inches. The width of a piece of paper was measured to be inches thick. In scientific notation, how much thicker is the piece of paper than the hair?

Find the sum of the numbers. Express your answer in scientific notation.

Which numbers are written in scientific notation? Check all that apply.

The steps to determine the sum are shown.Step 1. Rearrange the expression: Step 2. Add the coefficients: Step 3. Write in scientific notation: What is the value of in Step 3?

Find the difference. Express the answer in scientific notation.

Add and subtract the values. Express your answer in scientific notation.

Find the sum of the numbers. Express your answer in scientific notation.

Find the sum. Express the answer in scientific notation.

Find the sum. Express the answer in scientific notation.

A pool was filled with gallons from one hose and gallons from another hose. What is the total amount of water in the pool? Express the answer in scientific notation.