Writing Expressions

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, ×, ÷) that represents a value.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting numbers for the variables and performing the operations.

Front

What is the distributive property?

Back

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

Front

How do you write an expression for 'the sum of a number and 5'?

Back

You can write it as x + 5, where x represents the unknown number.

Front

What is a numerical expression?

Back

A numerical expression is a mathematical phrase that includes numbers and operations but no variables.

Front

How do you translate 'three times a number' into an expression?

Back

You can write it as 3x, where x is the number.

Front

What does 'subtract' mean in mathematical terms?

Back

Subtract means to take one number away from another, represented by the minus sign (-).

Front

What is the difference between an expression and an equation?

Back

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

Front

How would you express 'the product of 7 and a number' mathematically?

Back

You would write it as 7x, where x is the number.

Front

What does 'the sum of two numbers' mean?

Back

It means to add the two numbers together, represented by the plus sign (+).