7th grade Unit 2 Study Guide (Expressions)

Front

What is an expression in mathematics?

Back

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

Tags

CCSS.6.EE.A.2B

Front

How do you express 'the cost of strawberries if they are $2 per pound'?

Back

2x, where x represents the number of pounds.

Tags

CCSS.HSA-SSE.A.1A

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to combine like terms and reduce it to its simplest form.

Tags

CCSS.7.EE.A.1

Front

What is a coefficient in an algebraic expression?

Back

A coefficient is a numerical factor that multiplies a variable in an expression.

Tags

CCSS.6.EE.A.2B

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac, meaning you can distribute a factor across a sum.

Tags

CCSS.6.EE.A.3

Front

How do you factor the expression 14x - 20?

Back

You can factor it as 2(7x - 10).

Tags

CCSS.7.EE.A.1

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents an unknown value in an expression or equation.

Tags

CCSS.6.EE.A.2B

Front

What does it mean to combine like terms?

Back

Combining like terms involves adding or subtracting terms that have the same variable raised to the same power.

Tags

CCSS.7.EE.A.1

Front

What is the result of simplifying the expression 3(4x + 1) - 9x - 12?

Back

The result is 3x - 9.

Tags

CCSS.6.EE.A.3

Front

How do you simplify the expression (8m - 3) + (7m + 16)?

Back

You combine like terms to get 15m + 13.

Tags

CCSS.7.EE.A.1