What is the rule for adding integers?

Same signs: add the sizes and keep the sign. Different signs: subtract the sizes and keep the sign of the number with the bigger size.

What grade is this adding integers worksheet for?

It is written for grade 7 and matches Common Core standard 7.NS.A.1b.

Can I get a different version of this adding integers worksheet?

Yes. Use the free Mathify Kids test maker to make a new adding integers worksheet with different numbers every time, with its own answer key.

Adding integers worksheets

Adding integers three ways: number line jumps, integer chips with zero pairs, and mixed sums with same and different signs, ending with three-number sums.

Download the free adding integers worksheet (PDF)

Adding integers worksheet

PDF · US Letter · Grade 7 · 36 questions · answer key included

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What’s on the worksheet

36 questions on adding integers, sized for US Letter paper
2 pages of questions plus an answer key on the last page
Written for grade 7, matching Common Core 7.NS.A.1b
Name and date lines at the top, and room to show the work

Sample questions from this worksheet

7 + 15 =
11 + 3 =
17 + 18 =
13 + 3 =
Part D • Add three integers. Tip: add the positives, add the negatives, then combine

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Adding integers: a worked example (−9 + 5)

The signs are different, so subtract the sizes: 9 − 5 = 4.
The number with the bigger size is −9, which is negative.
So −9 + 5 = −4.
Check on a number line: start at −9 and move 5 to the right. You land on −4.

How to use it at home and in class

At home

Use a thermometer. −6 + 4 is “6 below zero, then warm up 4 degrees”, which is −2. For the chip questions, let your child ring each + and − pair with a pencil before counting what is left. For three-number sums, add all the positives, add all the negatives, then combine the two totals. Ten problems a day works better than a whole sheet at once. Mark them together with the answer key, then ask your child to explain one they got wrong: finding the mistake themselves is where the learning happens.

In class

Use the first row as a warm-up, a full page for independent practice, or five questions as an exit ticket. For a retake or a second group, make a new version with the test maker so every child gets different numbers.

Mistakes to watch for

Adding the sizes when the signs are different, giving −14 instead of −4.
Thinking two negatives make a positive when adding, so −3 + (−4) = 7. That rule is only for multiplying and dividing.
Taking the sign of the first number instead of the number with the bigger size.
Counting every chip in Part B instead of cancelling the zero pairs first.

What to practice before and after adding integers

Before: adding and subtracting integers. If this sheet is a struggle, go back a step.
After: subtracting integers, once this one is mostly right.
Learn it first: the adding integers lesson.