Review: Math 7th grade

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value. For example, 2x + 6x - 10 is an expression.

Front

What is the result of -5 - (-3)?

Back

The result is -2.

Front

How do you solve the equation 5.5 - 7.5?

Back

The solution is 13.

Front

What is the product of -8 and -4?

Back

The product is 32.

Front

If Tim buys 12 donuts for $9.96, how much does each donut cost?

Back

Each donut costs $0.83.

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression does not include an equality sign.

Front

What is the distributive property in mathematics?

Back

The distributive property states that a(b + c) = ab + ac. It allows you to multiply a number by a sum.

Front

What is the value of x in the equation 2x + 3 = 11?

Back

To find x, subtract 3 from both sides to get 2x = 8, then divide by 2 to find x = 4.

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.

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.