# Algebra

Free Math Games & Activities for Kids

Algebra is all about finding what is
missing in a puzzle. For example, _ + 3 = 5. The answer here
is 2. In algebra we use letters for the missing puzzle piece,
usually an X or Y, but any letter is fine. The letter just means that
we don't know what this number is, it is often called the variable
or the unknown. So using the first example, you would say x + 3
= 5. And the answer would be x = 2.The basic laws of algebra are the associative,
cumulative and distributive laws. They help explain the relationships between
numbers and help in simplifying equations to solve.

The general arithmetic operations performed in the case of
algebra are:

Addition: x + y

Subtraction: x – y

Multiplication: x * y

Division: x / y or x ÷ y

Where x
and y are the variables.

a2 – b2 = (a – b)(a + b)

(a + b)2 = a2 + 2ab + b2

a2 + b2 = (a – b)2 + 2ab

(a – b)2 = a2 – 2ab + b2

(a + b + c)2 = a2 + b2 + c2 + 2ab + 2ac + 2bc

(a – b – c)2 = a2 + b2 + c2 – 2ab – 2ac + 2bc

(a + b)3 = a3 + 3a2b + 3ab2 + b3

(a – b)3 = a3 – 3a2b + 3ab2 – b3

Algebra Games:

Math Find the Algebra integer game

Algebra Games (Shodor Interactive)

Linear Algebra - Night Life on the Chalkboard