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
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.
Evaluate 2 × 103 + 3.6 × 104, giving your answer in scientific notation.
Evaluate 7 × 105 – 5.2 × 104, giving your answer in scientific notation.
This video explains how to add and subtract numbers written in scientific notation, whether or not they have the same exponent.
This video explains how to do add and subtract in scientific notation without the use of a calculator.
This video shows how to add and subtract numbers in different bases by rewriting their exponents to be the same.
Learn how to add and subtract in scientific notation.