7th Grade Math · Adding and Subtracting Integers
Adding integers Worksheets
Free and printable, with a full answer key. Every worksheet is generated fresh, so you can hand a different version to every student.
Problems such as −7 + 4 and −6 + (−9), with numbers up to 20.
Or start with a ready-made version:
How it works: a quick refresher
For the adult at the table. These are the rules the worksheet practices, followed by one problem worked from start to finish.
| Strategy | How it works |
|---|---|
| Same signs: add | Add the numbers and keep the sign: −6 + (−9) = −15. |
| Different signs: subtract | Subtract the smaller size from the larger and use the sign of the larger: −7 + 4 = −3. |
| Subtracting is adding the opposite | 5 − (−3) = 5 + 3 = 8, and −8 − 6 = −8 + (−6) = −14. |
| Picture a number line | Adding a positive moves right, adding a negative moves left. |
Worked example
Find −4 − (−9).
- Change subtraction to adding the opposite: −4 + 9.
- The signs are different, so subtract the sizes: 9 − 4 = 5.
- The larger size, 9, is positive, so the answer is positive.
- −4 − (−9) = 5.
Ready-made versions
Three fixed versions you can link to or share. Each is a PDF with its own answer key.
- Adding integers Worksheets, version 1Worksheet PDFAnswer key PDF
- Adding integers Worksheets, version 2Worksheet PDFAnswer key PDF
- Adding integers Worksheets, version 3Worksheet PDFAnswer key PDF
Grade level and standard
Written for 7th grade math (number system) and aligned to CCSS 7.NS.A.1. It also works as review in later grades.
Common questions
- Is there an answer key?
- Yes. Every worksheet has a matching answer key with each answer worked on the same grid or layout as the question. The worksheet ID printed at the bottom of each page pairs a sheet with its key.
- Why are some numbers in parentheses?
- A negative number that follows a plus or minus sign is written in parentheses, as in 5 − (−3), so the two signs are not confused.
- Does this cover fractions and decimals?
- Not yet. These worksheets use whole numbers. The same rules apply to negative fractions and decimals.
- How many different versions are there?
- About a million per skill. Each time you press the button the problems are generated fresh, so you can print a different version for every student, a retake, or another night of practice.
- Are the worksheets free?
- Yes. They are free to print and copy for your home or classroom, with no sign-up.