3.NBT.A Number and Operations in Base Ten worksheets With Answers for Grade 3

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Explore our comprehensive collection of 3.NBT.A Number and Operations in Base Ten worksheets specially designed for Grade 3 students. These engaging worksheets focus on essential skills such as understanding multi-digit numbers, comparing and rounding them, and performing operations with larger values. Each worksheet comes with clear instructions and an answer key to help students enhance their math proficiency and gain confidence. Ideal for classroom use or homeschool settings, these resources aim to reinforce the fundamental concepts of base ten operations while making learning fun and interactive. Download your worksheets today and support your grade 3 learners in mastering this critical math standard!


Check out this FREE Grade 3 3.NBT.A Trial Lesson!

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Presidential Maze: Addition and Subtraction Worksheet
Presidential Maze: Addition and Subtraction Worksheet

Presidential Maze: Addition and Subtraction Worksheet

Help the President get elected by counting the votes on this fun addition and subtraction worksheet from Kids Academy! Guide learners to go through each problem, drawing a line through any that are completed correctly and leaving incorrect answers alone. Get voting and have a blast!
Presidential Maze: Addition and Subtraction Worksheet
Worksheet
Worm Math Rounding Down to the Nearest Ten Worksheet
Worm Math Rounding Down to the Nearest Ten Worksheet

Worm Math Rounding Down to the Nearest Ten Worksheet

Look at the full of smiles worms carrying two-digit numbers. Is the number in the ones spot 4 or less? Round down to the nearest ten! Help kids learn the tricky concept of rounding with this math worksheet. Perfect for clearing up confusion and practicing rounding down to the nearest ten!
Worm Math Rounding Down to the Nearest Ten Worksheet
Worksheet
Subtracting with Regrouping: Magnetism Worksheet
Subtracting with Regrouping: Magnetism Worksheet

Subtracting with Regrouping: Magnetism Worksheet

Download Kids Academy's worksheet for a fun way to review science and math! Look at the magnet and remember opposites attract. Find another with opposite poles, then solve the problem on the left and check the solution against the magnet. Check the box next to the correct answer to complete this page.
Subtracting with Regrouping: Magnetism Worksheet
Worksheet
Base ten block worksheets for 3rd grade
Base ten block worksheets for 3rd grade

Base Ten Blocks Worksheet: Part 1

They promote numeracy and are a great substitute when kids don't have access to physical blocks.
Base Ten Blocks Worksheet: Part 1
Worksheet
Rounding Influences Food Choices Worksheet
Rounding Influences Food Choices Worksheet

Rounding Influences Food Choices Worksheet

Kids find math more enjoyable when it reflects real-life scenarios. This free worksheet combines math and health! Kids view data on the number of ads they're exposed to in a year and must round the numbers to the nearest ten or hundred. Solve and check the correct answers to finish.
Rounding Influences Food Choices Worksheet
Worksheet
Free 3 digits with regrouping worksheet
Free 3 digits with regrouping worksheet

Three Digits Addition with Regrouping Worksheet

Kids can combine festive fun with subtraction practice by completing this free 3 digits with regrouping worksheet! Solve problems and find the correct answer among gingerbread cookies for a fun holiday twist on subtraction. Enjoy this festive activity with your child!
Three Digits Addition with Regrouping Worksheet
Worksheet
Rounding Natural Energy Sources Worksheet
Rounding Natural Energy Sources Worksheet

Rounding Natural Energy Sources Worksheet

Ask your kids what policies they would love to see if a politician is voted into power. Then, have them help the politician in this worksheet, downloading the PDF and rounding up the number of people to the nearest hundred in support of using different natural resources as an energy source. Guide them to the correct answer.
Rounding Natural Energy Sources Worksheet
Worksheet
Rounding down printable worksheet
Rounding down printable worksheet

Rounding Down Printable Worksheet

Help our bee friend take its honey pot back to the hive! With this worksheet, your kid can practice rounding numbers down. Have them guide the bee through the maze, choosing only numbers that round to 50 or 40.
Rounding Down Printable Worksheet
Worksheet
The Three Branches of Government Worksheet
The Three Branches of Government Worksheet

The Three Branches of Government Worksheet

Students learn best when they can relate ideas, like the three branches of government working together and addition and subtraction working together. This worksheet pairs math and social studies to help learners make an analogy. Help your child discover the relationship between addition and subtraction by completing the number sentences under each national landmark. This will help them solve tricky problems!
The Three Branches of Government Worksheet
Worksheet
Addition with regrouping worksheet
Addition with regrouping worksheet

Addition with Regrouping Worksheet

Try this fun holiday-themed addition with regrouping worksheet! Kids can practice adding while regrouping using bright, colorful holiday images. It's a great way to make math exciting, and keep their interest piqued!
Addition with Regrouping Worksheet
Worksheet
Rounding to the Constitution Worksheet
Rounding to the Constitution Worksheet

Rounding to the Constitution Worksheet

Before starting this traceable worksheet, ask your students: who is James Madison? If they know, you're doing great! If not, now's your chance to give a quick history lesson. Then, ask them to round the numbers to the nearest numbers. Get your students to draw a line through the numbers that round down to 400/500, to help James Madison reach the Constitution.
Rounding to the Constitution Worksheet
Worksheet
Voting Worksheet
Voting Worksheet

Voting Worksheet

This worksheet combines Social Studies and Math, teaching kids the democratic concept of voting. Guide learners to observe the problem, and decide if it needs a plus or minus. They "vote" for the correct answer by drawing a line from the problem to the correct operation symbol. Tally up the votes to check the answers!
Voting Worksheet
Worksheet
Rounding Numbers Down Worksheet
Rounding Numbers Down Worksheet

Rounding Numbers Down Worksheet

Does your child aspire to be a science researcher? This worksheet is the perfect place to start! Help your little one round the total number of animals seen in the desert to the nearest 10, then circle the correct answer for each. Fun and educational, this activity is a great way to help your kids get a taste of the science researcher lifestyle.
Rounding Numbers Down Worksheet
Worksheet
Rounding Numbers Up Worksheet
Rounding Numbers Up Worksheet

Rounding Numbers Up Worksheet

Does your child want to be a science researcher? If so, they share something in common with the person in this worksheet. She observed rainforest animals and counted them. Your child can help by rounding the totals to the nearest 10 and circling the correct answer for each type.
Rounding Numbers Up Worksheet
Worksheet
Subtracting with Regrouping with Base 10 Blocks. Part1 Worksheet
Subtracting with Regrouping with Base 10 Blocks. Part1 Worksheet

Subtracting with Regrouping with Base 10 Blocks. Part1 Worksheet

Subtracting with regrouping can be tough, but visuals make it easier! This worksheet uses colorful base ten blocks to help kids understand regrouping. Go over each problem starting at the ones, and review regrouping with a picture when needed. Finish by circling the correct answer.
Subtracting with Regrouping with Base 10 Blocks. Part1 Worksheet
Worksheet
Subtracting with Base 10 Blocks Worksheet
Subtracting with Base 10 Blocks Worksheet

Subtracting with Base 10 Blocks Worksheet

Is your child having difficulty with 3-digit subtraction? They're not alone! Show your kid the idea behind subtracting with the help of Kids Academy's PDF worksheet. Colorful green base blocks are used to visualize the concept. Starting from the tens column, subtract each number and use the images for guidance. Allow your child to circle the correct answer for a comprehensive math lesson.
Subtracting with Base 10 Blocks Worksheet
Worksheet
Rounding Healthy Diet Worksheet
Rounding Healthy Diet Worksheet

Rounding Healthy Diet Worksheet

Kids Academy understands the value of making math relevant. Check out this energizing rounding worksheet which merges math concepts with health class! Kids get to be aware of sugary treats and work out how many grams of sugar they contain. To complete, they view each item and round the number to the nearest 10. Remind them to focus on the ones column to decide if the number rounds up or down.
Rounding Healthy Diet Worksheet
Worksheet
Base 10 Blocks Worksheet: Part 1
Base 10 Blocks Worksheet: Part 1

Base 10 Blocks Worksheet: Part 1

Need help teaching place value without manipulatives? Kids Academy has you covered! Our printable worksheet will help learners review the language like cubes, longs and flats. Just use the images at the top as a reference and have learners circle the answers and select its expanded form. Kids will master one to four-digit numbers without needing manipulatives.
Base 10 Blocks Worksheet: Part 1
Worksheet
Rounding National Landmarks Worksheet
Rounding National Landmarks Worksheet

Rounding National Landmarks Worksheet

Does your city have tourist attractions? Help your kids count visitors to these national landmarks by rounding up to the nearest hundred. Then check the correct answer from the provided options. Or explore tourist centres in another state with your family.
Rounding National Landmarks Worksheet
Worksheet
Regrouping with Base 10 Blocks Worksheet
Regrouping with Base 10 Blocks Worksheet

Regrouping with Base 10 Blocks Worksheet

Practice and master 3-digit subtraction with this handy worksheet! It uses base ten blocks to illustrate what's being taken away, helping children understand this tricky skill. Viewing the visual aid will help them get the hang of larger numbers quickly.
Regrouping with Base 10 Blocks Worksheet
Worksheet
Subtracting with Regrouping with Base 10 Blocks. Part 2 Worksheet
Subtracting with Regrouping with Base 10 Blocks. Part 2 Worksheet

Subtracting with Regrouping with Base 10 Blocks. Part 2 Worksheet

Give your kids the practice they need to master subtracting with regrouping with Kids Academy's printable worksheet. It contains two 3-digit problems for kids to solve, plus colorful blocks to help them understand the concept more easily. Help your kids succeed!
Subtracting with Regrouping with Base 10 Blocks. Part 2 Worksheet
Worksheet
Rounding on the National Mall Worksheet
Rounding on the National Mall Worksheet

Rounding on the National Mall Worksheet

Math and social studies come together in this worksheet. Learners must round numbers to record attendance at Washington D.C. monuments and memorials. Remind them to round down to the nearest hundred. Extend the lesson by talking about each monument - a great way to teach or refresh your child's knowledge of these national landmarks!
Rounding on the National Mall Worksheet
Worksheet
3 Digit addition with regrouping worksheet
3 Digit addition with regrouping worksheet

Triple Digit Addition with Regrouping Worksheet

Kids will love the bright visuals as they transport their child to the correct answer after completing each 3-digit addition problem.
Triple Digit Addition with Regrouping Worksheet
Worksheet
Base 10 Blocks Worksheet: Part 2
Base 10 Blocks Worksheet: Part 2

Base 10 Blocks Worksheet: Part 2

Need practice with one- to four-digit numbers using base blocks? This worksheet is perfect! Review the cubes and language to ensure understanding. View the images and select the correct number. Check the expanded form to finish this free printable math practice!
Base 10 Blocks Worksheet: Part 2
Worksheet


Parents and teachers should prioritize understanding the 3.NBT.A standard in the Number and Operations in Base Ten domain because it lays a crucial mathematical foundation for third-grade students. This standard focuses on aiding students in mastering place value, particularly with numbers up to 1,000. By learning to read, write, and compare numbers, children develop number sense, which is essential for their overall mathematical fluency.

Emphasizing 3.NBT.A helps students grasp the value of digits based on their position, as in knowing that in the number 345, the "3" stands for 300. This foundational understanding will facilitate students' ability to perform strategies for addition and subtraction with larger numbers, eventually leading to more complex arithmetic later in their education.

Moreover, when parents and teachers are engaged in this learning process, they can provide consistent reinforcement at home and in the classroom. Collaborative efforts ensure that lessons about base ten are applied. With this essential skill set, children will feel more confident tackling future math concepts, drastically enhancing their academic success and promoting a positive attitude toward mathematics. Therefore, understanding and nurturing the 3.NBT.A standard is pivotal in shaping proficient, enthusiastic mathematical learners.