The Basics (Junior Cert Mathematics): Quizzes

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Adding/Subtracting Algebraic Expressions
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In algebra, what are symbols (usually letters) that represent numbers called?

Variables

What can an algebraic expression include?

Numbers, variables & operation signs

What are like terms?

Terms with same variable & power

Are 5y5y and 2y2y like terms?

Yes, both contain variable yy

Why are 3x3x and 4y4y NOT like terms?

Different variables

What is the first step when adding algebraic expressions?

Identify the like terms

When combining like terms, what do you combine?

The coefficients

What is 3x+4x3x + 4x?

7x7x

Subtracting a negative is the same as what?

Adding

What are constant terms?

Numbers without variables

Are 3x23x^2 and 4x24x^2 like terms?

Yes, both contain x2x^2

What exam tip helps when adding/subtracting expressions?

Align like terms vertically

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