Evaluating Expressions with Variables

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number in mathematical expressions or equations.

Tags

CCSS.6.EE.A.2B

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with specific numbers.

Tags

CCSS.6.EE.A.2C

Front

How do you divide a total amount among a group of people?

Back

To divide a total amount among a group, you can use the expression: total amount ÷ number of people.

Tags

CCSS.6.EE.A.2C

Front

If a cat weighs 6 pounds more than a rabbit, how can we express the cat's weight in terms of the rabbit's weight?

Back

If r is the weight of the rabbit, the cat's weight can be expressed as r + 6.

Tags

CCSS.6.EE.B.6

Front

What is the formula to find the total weight of multiple animals if you know the weight of one?

Back

If you know the weight of one animal and how much more or less other animals weigh, you can express their weights in terms of that animal's weight.

Tags

CCSS.6.EE.B.6

Front

How do you represent a situation where one quantity is a multiple of another?

Back

You can represent this with multiplication. For example, if a dog weighs 3 times as much as a cat, and c is the weight of the cat, the dog's weight is 3c.

Tags

CCSS.6.EE.B.6

Front

What is the importance of parentheses in mathematical expressions?

Back

Parentheses indicate which operations should be performed first in an expression, affecting the final result.

Tags

CCSS.6.EE.A.2C

Front

How do you solve for a variable in an equation?

Back

To solve for a variable, isolate it on one side of the equation using inverse operations.

Tags

CCSS.7.EE.B.4A

Front

What does it mean if an expression is simplified?

Back

An expression is simplified when it is reduced to its simplest form, with no like terms or unnecessary operations.

Front

How can you express the total amount of money earned by multiple friends?

Back

If each friend earns a different amount, you can express the total as the sum of their individual earnings.

Tags

CCSS.6.EE.B.6