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Year 8 Algebra

Definitions and Facts from the NSW Year 8 Algebra Topic

TermDefinition
algebraic expressions expressions that describe a quantity, using variables and numerals
algebraic terms he parts of an algebraic expression
evaluate to find the value of an algebraic expression after substitution
expand to rewrite an expression such as 4(2k + 4) without grouping symbols
factorise the opposite of expand; to rewrite an expression such as 8k + 16 with grouping symbols
like terms terms with exactly the same variables such as 5p and 2p
substitution replacing a variable with a number
variables letters of the alphabet used to stand for a number, also called pronumerals or unknowns
formula a fact or rule that uses mathematical symbols.
pronumeral a letter or symbol taking the place of a number. Another name for Variable.
simplify to make an expression simpler
difference the result of subtracting one term from another
Created by: wdobson
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