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# Unit: Variables & expressions

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### About this unit

A variable is a symbol that represents a value, often one that changes, like how long you've been awake. Learn ways that we can change an expression's value (such as by changing the values of its variables) or keep the value the same (such as with the distributive property).### Learn

### Practice

- Evaluating expressions with one variableGet 5 of 7 questions to level up!
- Variable expressions with exponentsGet 3 of 4 questions to level up!

### Learn

### Practice

- Evaluating expressions with multiple variablesGet 3 of 4 questions to level up!
- Evaluating expressions with multiple variables: fractions & decimalsGet 3 of 4 questions to level up!

### Practice

- Expression value intuitionGet 3 of 4 questions to level up!

### Learn

### Practice

- Evaluating expressions with variables word problemsGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 560 Mastery points

### Learn

### Practice

- Writing basic expressions with variablesGet 5 of 7 questions to level up!
- Writing expressions with variablesGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 240 Mastery points

### Learn

### Practice

- Greatest common factorGet 5 of 7 questions to level up!
- Factor with the distributive property (no variables)Get 5 of 7 questions to level up!

### Learn

### Practice

- Distributive property with variablesGet 3 of 4 questions to level up!
- Create equivalent expressions by factoringGet 3 of 4 questions to level up!
- Factor with distributive property (variables)Get 3 of 4 questions to level up!

### Learn

### Practice

- Combining like termsGet 3 of 4 questions to level up!

### Practice

- Equivalent expressionsGet 5 of 7 questions to level up!

Level up on the above skills and collect up to 640 Mastery points

Up next for you:

Level up on all the skills in this unit and collect up to 1800 Mastery points!