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# Unit 3: Integers: addition and subtraction

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## About this unit

Let's extend our addition and subtraction understanding to include negative numbers. Whether we need temperatures below zero, altitudes below sea level, or decreases from any other reference point, negative numbers give us a way to represent it.

### Learn

### Practice

- Zero pairsGet 3 of 4 questions to level up!
- Add with integer chipsGet 3 of 4 questions to level up!
- Adding negative numbers on the number lineGet 5 of 7 questions to level up!

### Practice

- Signs of sumsGet 5 of 7 questions to level up!
- Adding negative numbersGet 5 of 7 questions to level up!

Level up on the above skills and collect up to 400 Mastery points

### Learn

### Practice

- Subtract with integer chipsGet 3 of 4 questions to level up!
- Number equations & number linesGet 3 of 4 questions to level up!
- Interpret negative number addition and subtraction expressionsGet 3 of 4 questions to level up!

### Learn

### Practice

- Understand subtraction as adding the oppositeGet 3 of 4 questions to level up!
- Subtracting negative numbersGet 5 of 7 questions to level up!

### Learn

### Practice

- Adding & subtracting negative numbersGet 5 of 7 questions to level up!
- Addition & subtraction: find the missing valueGet 3 of 4 questions to level up!

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

### Practice

- Substitution with negative numbersGet 5 of 7 questions to level up!
- Ordering negative number expressionsGet 3 of 4 questions to level up!
- One-step equations with negatives (add & subtract)Get 5 of 7 questions to level up!

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Level up on all the skills in this unit and collect up to 1,500 Mastery points!