Adding/Subtracting Algebraic Expressions (Junior Cert Mathematics): Flashcards

Symbols (usually letters) that represent numbers

Mathematical phrase with numbers, variables, and operation signs

Terms with same variable raised to same power

Identify like terms (same variable, same exponent)

Combine the coefficients of like terms

Write expression with new coefficients

$3x$ and $2x$ (both contain variable $x$)

Numbers without variables (e.g., $-1$ and $5$)

Same as adding (e.g., $5b-(-2b)=5b+2b$)

$x^2$ terms

They affect final coefficients when adding/subtracting

Makes it easier to add/subtract correctly