Unit 4 Expressions 6th Grade Math

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

Front

What does the term 'variable' mean in algebra?

Back

A variable is a letter or symbol that represents an unknown number in an expression or equation.

Front

Evaluate the expression 2(x + 3) when x = 4.

Back

14

Front

Evaluate the expression 2x + 3 when x = 4.

Back

11

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign, while an equation does.

Front

What is the value of m² + 12q + 3 if m = 5 and q = 3?

Back

64

Front

What is a coefficient in an algebraic expression?

Back

A coefficient is a number that multiplies a variable.

Front

Is the expression 3x + 12 equivalent to 3(x + 3) + 3?

Back

Yes, they are equivalent.

Front

What is the least common multiple (LCM) of 9 and 15?

Back

45 seconds.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with numbers.