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To solve a problem we need to find the value of an unknown quantity or
quantities. The unknown quantity or quantities are represented by
letters that are known as pronumerals.
An expression is a combination of mathematical terms
using operations such as addition, subtraction, multiplication, division,
brackets, powers or roots.
For example, 2x + 3y is an expression involving addition
where 2x and 3y are called the terms of the
expression. Terms often include pronumerals but may also be a number
called a constant term.
Terms with the same pronumeral or pronumerals are called like terms.
Terms that do not have the same pronumerals are called unlike terms.
Addition and Subtraction
Only like terms can be added (or subtracted) to simplify an expression
involving addition (or subtraction).
Example 1
Solution:
Key Terms
pronumerals, expression, terms,
constant term, like terms, unlike terms |
