Need extra 3rd grade math practice? These 10 free printable mental math worksheets are an easy way to give third graders additional practice with addition, subtraction, multiplication, and division.
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This free PDF worksheet pack includes 10 printable pages, Worksheets 11–21, with varied equations on each page. The worksheets are designed to provide quick math practice without requiring a complicated lesson or preparation. This is Set 2 — if your student hasn’t done Set 1 (Worksheets 1–10) yet, start there first.
Whether you’re a teacher looking for classroom worksheets, a parent helping with homework, or a homeschooler building a math practice routine, these free third grade math worksheets are ready to print and use.
Free Printable 3rd Grade Math Worksheets
Mental math practice is a simple way to help children become more comfortable working with numbers. Instead of spending a long time on one type of problem, students can work through a variety of equations and practice choosing the correct operation.
Every worksheet in this collection includes a mixture of:
- Addition
- Subtraction
- Multiplication
- Division
The equations vary from page to page, giving students new problems to solve throughout the set.
Worksheets 11–21
This collection continues with Worksheets 11–21, providing another group of printable mental math activities for third graders.
Each page can be used independently, so you don’t have to complete the worksheets in order. Print the pages your student needs or download the complete PDF to create a larger 3rd grade math worksheet packet.
Why Use Mental Math Practice?
Mental math helps students develop flexibility when working with numbers. Regular practice can make basic calculations feel more familiar and help children approach math problems with greater confidence.
For third graders, continued practice with the four operations can support skills such as:
Addition and subtraction: Building accuracy and fluency with basic calculations.
Multiplication: Practicing multiplication facts and becoming more comfortable with repeated addition and number relationships.
Division: Reinforcing division facts and the relationship between multiplication and division.
Number sense: Encouraging students to recognize patterns and relationships between numbers.
The goal isn’t simply to finish a worksheet quickly. Consistent practice gives students more opportunities to recognize equations, recall math facts, and develop efficient ways to solve problems.
Great for School, Home & Homeschool
These printable 3rd grade math worksheets are flexible enough to use in a variety of learning environments.
Classroom Activities
Teachers can use the worksheets for morning work, independent math practice, review, math centers, homework, or extra practice.
Homeschool Lessons
Add a worksheet to your regular homeschool math routine for additional practice with the four operations.
Homework Practice
Use a page for quick homework or additional practice after a lesson.
Tutoring
These worksheets can also be useful for tutors who want a simple way to give students additional practice between lessons.
Summer Learning
Print several pages for summer math practice to help children continue working with addition, subtraction, multiplication, and division during school breaks.
A Quick Math Practice Option
Not every math practice session needs to be a long lesson.
A short worksheet can provide students with an opportunity to sit down, focus on numbers, and practice several different types of equations. This makes these worksheets useful when you need a quick 3rd grade math activity.
You can give students one page at a time or print all 10 pages to create a convenient mental math workbook or practice packet.
Download the Free PDF
Ready for more third grade math practice?
Download the 10 free printable 3rd grade mental math worksheets as a PDF and give your student additional practice with addition, subtraction, multiplication, and division.
This collection includes Worksheets 11–21 with varied equations throughout the pages.
⭐ Download the free PDF and start practicing today!
More 3rd Grade Printable Math Activities
If you’re looking for more third grade math worksheets, explore additional printable activities for addition, subtraction, multiplication, division, mental math, math facts, and general math review.
Printable worksheets are an easy resource for parents, teachers, homeschoolers, and tutors who want convenient 3rd grade math practice that can be used whenever students need it.
Free Fall & Thanksgiving 3rd Grade Mental Math Worksheets
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10 Free 3rd Grade Mental Math Worksheets: Set 1
Looking for free 3rd grade mental math worksheets to help your child practice important math skills? This collection includes 10 free printable third grade math worksheets with a mix of addition, subtraction, multiplication, and division problems. This is Set 1, covering Worksheets 1–10 — once your student finishes these, continue with Set 2 (Worksheets 11–21)…
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