Integer Subtraction Code Breaker
Written by Adi Ackerman, Head Teacher
"Integer Subtraction Code Breaker" is written for 7th Grade (Ages 12-13), and it covers Common Core 7.NS.A.1.C. A 6th grader who is already steady on math puzzles can use it too, and an older student can use it as a short review.
7th grade math worksheet: subtract integers and match each difference on a code strip to a letter to read a hidden message. Answer key included. Part of our code breakers math puzzles collection. Aligned to Common Core standards.
How do I use this worksheet?
Use these as a change from drill after teaching integer subtraction. A wrong difference gives a wrong letter, so students notice and fix errors.
What students will practice
- Students will find differences of integers, including subtracting a negative.
- Students will locate each difference on a code strip to find its letter.
- Students will write letters in numbered boxes to decode the message.
Curriculum Links
Common Core State Standards
The Number System · 7th Grade
Standard: Understand subtraction of rational numbers as adding the additive inverse, p - q = p + (-q). Show that the distance between two rational numbers on the number line is the absolute value of their difference, and apply this principle in real-world contexts.
View all 7.NS.A.1.C worksheets →Find this in the curriculum
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FAQ
How do I use this code breakers worksheet?
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Use these as a change from drill after teaching integer subtraction. A wrong difference gives a wrong letter, so students notice and fix errors.
What does this worksheet teach?
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Subtract integers and match each difference on a code strip to a letter to read a hidden message. The directions on the page read: Find each difference. Find your answer on the code strip. Write its letter in the box that has the same number as the problem. An answer key is included.
Can I use this code breakers worksheet for homeschool or classroom?
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Yes, both. We made it for 7th grade math puzzles, and it works the same at home or at school. At home, a student can work through it alone and then go over it with you, which shows quickly what is solid and what needs another look. In class it works as independent practice, homework or a warm-up, and you can print one copy or a full set.
What is a math code breaker?
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A puzzle where each answer points to a letter or number, and the answers together reveal a message or code.
What integer skills do these cover?
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Subtracting integers on three pages, integer word problems on one and a letter sudoku with mixed operations on one.
Do they have answer keys?
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Yes, all 5 do.
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Worksheet Details
| Grade | 7th Grade |
| Subject | Math |
| Topic | Math Puzzles |
| Standard | 7.NS.A.1.C |
| Pages | 1 page |
| Difficulty | Medium |
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