5.19 Algebra

Front

What is a variable in algebra?

Back

A variable is an unknown number that can change or vary.

Front

What does the expression 't x 4' represent?

Back

The product of t and 4.

Front

How can you express 'a number times 3' in algebraic form?

Back

3n.

Front

What number sentence represents the problem: Mark had 12 cars. Together, Mark and Sara had 21 cars. How many cars did Sara have?

Back

12 + g = 21.

Front

Which problem could be represented by the number sentence 12 + 3 = ?

Back

Terry has 3 more cars than his brother who has 12. How many cars does Terry have?

Front

What is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions.

Front

What is an expression in algebra?

Back

An expression is a combination of numbers, variables, and operations without an equality sign.

Front

What does '3n' mean in algebra?

Back

It means 3 times a number n.

Front

What is the purpose of using variables in algebra?

Back

Variables allow us to represent unknown values and solve problems.

Front

What is the difference between an equation and an expression?

Back

An equation has an equality sign, while an expression does not.