Expressions and Equations Flashcards

Grade 6 · Math · Flashcards

Key vocabulary and practice problems for expressions and equations.

Flashcards

Variable: A letter used to represent an unknown value, e.g., x, y, or n
Coefficient: The number multiplied by a variable; in 4x, the coefficient is 4
Constant: A fixed number in an expression that does not change, e.g., the 5 in 3x + 5
Like Terms: Terms that have the same variable and exponent; 3x and 7x are like terms
Evaluate an expression: Substitute a number for the variable and simplify; e.g., evaluate 2x + 3 when x = 4 → 11
Solve an equation: Find the value of the variable that makes the equation true using inverse operations
Solve: 5x = 35: Divide both sides by 5 → x = 7
Solve: x + 9 = 21: Subtract 9 from both sides → x = 12
Solve: x − 6 = 10: Add 6 to both sides → x = 16
Solve: x ÷ 4 = 8: Multiply both sides by 4 → x = 32
Write: 5 more than a number n: n + 5
Write: a number n divided by 3: n ÷ 3 or n/3
Write: twice a number n minus 4: 2n − 4