Mathematical Expressions

Front

What is a mathematical expression?

Back

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

Front

What does it mean to subtract a number from a variable?

Back

Subtracting a number from a variable means to take that number away from the value represented by the variable. For example, k - 2 means the value of k minus 2.

Front

If Aiden has 6 apples and gives 'c' apples to Luna, what expression represents how many apples Aiden has left?

Back

6 - c

Front

What is the result of giving away a fixed number of items from a total?

Back

The result is found by subtracting the number of items given away from the total. For example, if you have m marbles and give away 15, the expression is m - 15.

Front

How do you express sharing a quantity equally between two people?

Back

To express sharing a quantity m equally between two people, you divide it by 2, resulting in m/2.

Front

What is the expression for a number 'x' increased by 7?

Back

The expression is x + 7.

Front

What does the variable 'k' represent in an expression?

Back

The variable 'k' represents an unknown value that can change.

Front

How do you represent the total number of items after adding a certain number to a variable?

Back

You add the number to the variable. For example, if you have 'x' and add 5, the expression is x + 5.

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression is a combination of numbers and variables without an equality sign.

Front

How do you express the total number of apples after giving some away?

Back

You subtract the number given away from the total. For example, if you start with 10 apples and give away 3, the expression is 10 - 3.