In this lesson, we will look at some examples of adding and subtracting numbers in scientific notation (Scientific notation is called standard form in the UK)

Related Topics: More Scientific Notation Lessons

### Scientific Notation: Addition and Subtraction

### Videos

This video explains how to add and subtract numbers written in scientific notation, whether or not they have the same exponent.
This video explains.why when adding and subtracting numbers in scientific notation, you have to make sure the exponents are the same.

This video reviews scientific notation and shows how to add and subtract in Scientific Notation.
#### Scientific Notation - Addition and Subtraction

This video explains how to do add and subtract in scientific notation without the use of a calculator.

#### Adding and Subtracting Numbers in Scientific Notation

This video shows how to add and subtract numbers in different bases by rewriting their exponents to be the same.
#### Scientific Notation - Adding and Subtracting

Learn how to add and subtract in scientific notation.

You can use the free Mathway widget below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

Related Topics: More Scientific Notation Lessons

To add or subtract two numbers in scientific notation:

** Step 1:** Adjust the powers of 10 in the 2 numbers so that they have the same index. (Tip: It is easier to adjust the smaller index to equal the larger index).

** Step 2:** Add or subtract the numbers.

** Step 3:** Give the answer in scientific notation.

* Example:*

Evaluate 2 × 10^{3} + 3.6 × 10^{4}, giving your answer in scientific notation.

* Solution: *

*Example:*

Evaluate 7 × 10^{5} – 5.2 × 10^{4}, giving your answer in scientific notation.

* Solution: *

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway widget below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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