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.

Front

How do you represent a quantity that is 'more than' another quantity in an expression?

Back

You add the additional amount to the original quantity. For example, if Sarah has D dogs and Emily has two more, the expression is D + 2.

Front

How do you represent a quantity that is 'less than' another quantity in an expression?

Back

You subtract the amount from the original quantity. For example, if Harry has P pencils and John has 4 less, the expression is P - 4.

Front

What is the expression for a length that is a certain number of inches longer than another length?

Back

You add the additional inches to the original length. For example, if the desk is D inches long and the table is 12 inches longer, the expression is D + 12.

Front

How do you find the area of one section of a garden divided into equal parts?

Back

You divide the total area by the number of sections. For example, if the garden has an area of A square feet and is divided into 8 sections, the expression is A / 8.

Front

What does the variable 'D' typically represent in expressions?

Back

The variable 'D' can represent any quantity, such as the number of dogs, length in inches, or any other measurable amount.

Front

What does the variable 'A' typically represent in expressions?

Back

The variable 'A' usually represents an area, such as the total area of a garden or space.

Front

What does the variable 'P' typically represent in expressions?

Back

The variable 'P' usually represents a quantity, such as the number of pencils someone has.

Front

What is the significance of using variables in expressions?

Back

Variables allow us to represent unknown quantities and create general formulas that can be applied to various situations.

Front

How can you express a relationship between two quantities using expressions?

Back

You can express relationships by using addition or subtraction to show how one quantity is related to another, such as 'more than' or 'less than'.