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Math for Kids23 chapters | 325 lessons

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Instructor:
*Jessica Mommens*

Jessie has taught elementary school for nine years and have a masters in Elementary Administration.

What are base numbers and how do we use them in math? The fact is that we deal with base numbers all the time when doing math and we don't even realize we are doing it. Read on to figure out what base numbers are and how we use them.

**Base numbers** are the number of units, or numbers, we use in our counting system, also called a number system. The most common base number is ten because the digits 0-9 are used in the number system. In other words, whenever we want to tell a number to someone we don't use any numbers besides 0-9. If it was a base-5 number system we would only use five different digits, like 0-4.

We can think of base numbers like the *base*ment of a house, it is the 'foundation' of all of our math work. In this picture, the gray is the foundation of the house. It holds up the house and helps it do its job of keeping people safe. Base-10 numbers are the foundation of our math. It makes all math work!

In math, a base number is written as a large number with a small 'floating' number up to the right of the base number. The base number is the large number before the floating number. The small 'floating' number is called the **exponent**. The exponent tells us how many times we should multiply our base number times itself.

An example of how you may see this in math is as follows:

8 2

In this case 8 is the base number. To solve this, you would take the base number and multiply it by the number of times indicated by the exponent. In other words, you would multiply 8 times itself two times, or 8 x 8, which gives you 64. Therefore 8 2 is 64.

Another example would be if we are working in base-10, then we would only use the digits 0-9 when we are showing a number. For instance to show a decimal we may write it as follows:

2.653

That decimal is written in base-10.

OR even to tell someone we need 650 cookies...that number is written in base-10 because we only used digits 0-9!

Base numbers are the basis for our math system. Base numbers can mean the number of different numbers we use when expressing a digit in math. For example, when we use base-10, we use 10 numbers (digits 0-9) any time we show any number in math! We may also think of base numbers as the large number with a floating number (exponent) next to it.

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Math for Kids23 chapters | 325 lessons

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- What is an Abundant Number?
- What is a Base Number?
- What Are Consecutive Numbers? - Definition & Examples 3:22
- Finding the Sum of Consecutive Numbers 4:10
- What is a Cubed Number?
- What is a Deficient Number?
- What Are Figurate Numbers? - Definition & Examples
- What Are Opposite Numbers? - Definition & Examples 2:53
- What Are Rectangular Numbers? - Definition & Examples 3:05
- Like & Unlike Terms
- Is Zero an Integer?
- Is Zero a Natural Number? 2:37
- Sieve of Eratosthenes: Lesson for Kids
- What Are Twin Prime Numbers? 3:22
- Go to Types of Numbers for Elementary School

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