Algebra – Basic Definitions (For Kids)
Algebra may sound like a big and scary word at first, but it is actually an interesting way to solve puzzles using mathematics! In algebra, letters and numbers are used to find unknown values. Let’s explore algebra step by step using simple topics and examples. These characters are used for unknown values - like the secret numbers we want to know!
Example:
If someone says:
I think of numbers. Adding 5 will get 12.
You can write this:
x + 5 = 12
Here is the number we want to find!
What are variables?
A variable is a character or symbol that represents an unknown number. We don’t know his worth yet, but we can!
Example:
x + 3 = 10
x is the variable here. This represents the number added to 3.
A constant is a number whose value remains the same. It’s always the same.
What is an expression?
They are just some of the mathematical statements.
What is an equation?
It has the same symbol (=), indicating that two things are the same.
Equation or equation. It can be a number, a variable, or a number with a variable. 6
What is a similar term? Constant)
However:
3x and 3y are not similar terms (different variables)
How can I add or subtract similar terms?
Add or subtract coefficients and keep the variables the same.
Example:
2x + 5x = 7x
3y= 3y
4a + 3b = cannot be added (not like the terminology)
What is the solution?
One solution is the answer to the algebraic problem. Indicates the value of the variable that makes the equation true. Variables are often used.
Simple Algebraic Equations
Some input simple elements are rare. Page:
x = 11
Using Algebra in Real Life
Real Life Issues:
If it costs 1 chocolate x dollar, how much is 5 chocolate?
2, 5, 10
Conceptual equations/equations 3x, -2, 5a
4x
Coefficient numbers 4
Formula x + 2, 5y
Equivalent symbol x + 3 = 10
5x, 5x, 5x, 5x, 5x
Like a treasure map, x is the hidden value we found!
Exercise time!
Try to solve this:
x + 4 = 12
x = ___
3x= 15
x = ___
x2= 9
x = ___
What is the coefficient for 6Y?
Are 2A and 5A similar terms?
(Answer: 1.x=8,2.x=5,3.x=11,4.6,5. Yes)
The _____ terms can be numbers or numbers with variables.
