- Definition
A constant is a number in a math problem that always stays the same, unlike a variable (a letter) which can change.
In the expression x − 5, the number 5 is the constant because it does not change.
How to teach this in 30 seconds
Try this analogy: A constant is like the number of legs on your kitchen table — it's a number that doesn't change.
Ask your child: You have 2 cookies, then get more. Which number is the constant?
Common mix-up: Kids may think all parts of a math problem can change. A constant is a specific number that is fixed, unlike a variable which can stand for different numbers.
Examples
- In the expression 4 + b, the number 4 is the constant.
- If you have 5 toys and get some more for your birthday, the 5 is the constant.
constant is a term used in Ontario’s Kindergarten to Grade 8 curriculum.
Where this shows up
The descriptions on this page are SmartStudy’s own original, plain-language writing — not the Ministry’s wording. They are aligned to the Ontario Curriculum, © King’s Printer for Ontario. For the Ministry’s official wording, see the source link below. SmartStudy is an independent service and is not affiliated with, endorsed by, or sponsored by the Government of Ontario or the Ministry of Education. Ontario Curriculum and Resources ↗
