Khan Academy Static

Like_and_unlike_terms_adding_and_subtracting

When terms have the same algebraic factors, they are like terms. When terms have different algebraic factors, they are unlike terms. Here we will learn how to write expressions and how to add expressions. While adding and subtracting expressions, first look for like terms and add them; then handle unlike terms. Let's understand this better!

Terms_of_an_expression

In this topic, we will learn what is meant by terms, factors and coefficients.

Finding_the_value_of_an_expression

The value of an algebraic expression depends on the values of the variables forming the expression. There are a number of situations in which we need to find the value of an expression, such as when we wish to check whether a particular value of a variable satisfies a given equation or not. Let's understand in detail what we mean by this!

How_are_expressions_formed_

A variable is denoted by 'x,y,z…' and it can hold many values whereas a constant has a fixed value. The combination of variables and constants makes up an algebraic expression. You have already lean how to form algebraic expressions in class 6th, let's check how much you remember.