6th Grade Expressions Flashcard Review

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 is a coefficient?

Back

A coefficient is a numerical factor in a term of an expression. For example, in the term 5x, 5 is the coefficient.

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change. For example, in the expression 3x + 4, 4 is the constant.

Front

How do you simplify the expression x + x + x + x + x + y + y?

Back

Combine like terms: 5x + 2y.

Front

What does it mean to evaluate an expression?

Back

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

Front

Evaluate the expression 4(a + 5) + b if a=3 and b=8.

Back

Substituting gives 4(3 + 5) + 8 = 4(8) + 8 = 32 + 8 = 40.

Front

What is the result of evaluating 3xy if x=5 and y=2?

Back

Substituting gives 3(5)(2) = 30.

Front

What are equivalent expressions?

Back

Equivalent expressions are expressions that have the same value for all values of their variables.

Front

Give an example of equivalent expressions.

Back

9 + 5 + w = (9 + 5) + w is an example of equivalent expressions.

Front

What is the difference between a term and an expression?

Back

A term is a single mathematical entity (like 5x or 12), while an expression is a combination of terms (like 5x + 12).