Standard form calculations

What you'll learn

1. 1

   Standard form is a way to write very big or very small numbers, like 3 × 10⁴ = 30,000. Imagine counting grains of sand on a beach – way too many to write normally!

2. 2

   Let's build 5 × 10³. Move the decimal point 3 places to the right.

3. 3

   Let's turn 7.2 × 10⁵ into a normal number.

4. 4

   What is 4 × 10³ as a normal number?

5. 5

   Now try 6.5 × 10⁴. Move the decimal 4 places to the right.

6. 6

   Now let's do a small number: 3.1 × 10⁻³.

7. 7

   What is 5.2 × 10⁻² as a normal number?