MyMathKidK-8 Curriculum

Grade 3 Addition Worksheets

Master addition step by step, from basic concepts to advanced problem solving

Common Core: 3.NBT — Number & Operations in Base Ten

Watch & Learn

Learning Path

Start with Lesson 1 and work your way through!

2-Digit Addition

Add 2-digit numbers without regrouping

Add ones to ones and tens to tensLine up digits by place value+1 more

2-Digit Addition with Regrouping

Learn to carry when adding

Understand when to regroup (carry)Carry from ones to tens+1 more

3-Digit Addition

Add 3-digit numbers without regrouping

Add hundreds, tens, and onesLine up numbers correctly+1 more

3-Digit Addition with Regrouping

Regroup across multiple columns

Regroup from ones to tensRegroup from tens to hundreds+1 more

Mixed Multi-digit Addition

Practice with various digit combinations

Add numbers with different digit countsAlign numbers correctly+1 more

4-Digit Addition

Add larger numbers with thousands

Add 4-digit numbersWork with the thousands place+1 more

How to solve Grade 3 addition problems

Real problems from these worksheets, solved one step at a time — the same explanations your child sees when practicing online.

Example 1
60 + 22 = ?
1. Break apart both numbers by place value.
2. 60 = 60 + 0
3. 22 = 20 + 2
4. Add the tens: 60 + 20 = 80
5. Add the ones: 0 + 2 = 2
6. Combine: 80 + 2 = 82
Answer: 82
Example 2
138 + 698 = ?
1. Line up the numbers by place value.
2. Add each column from right to left.
3. Ones: 8 + 8 = 16. Write 6, carry 1.
4. Tens: 3 + 9 + 1 (carried) = 13. Write 3, carry 1.
5. Hundreds: 1 + 6 + 1 (carried) = 8
6. The answer is 836.
Answer: 836
Example 3
7477 + 676 = ?
1. Line up the numbers by place value.
2. Add each column from right to left.
3. Ones: 7 + 6 = 13. Write 3, carry 1.
4. Tens: 7 + 7 + 1 (carried) = 15. Write 5, carry 1.
5. Hundreds: 4 + 6 + 1 (carried) = 11. Write 1, carry 1.
6. Thousands: 7 + 0 + 1 (carried) = 8
7. The answer is 8153.
Answer: 8153

Frequently Asked Questions

Are these Grade 3 Addition worksheets free?: All printable Addition worksheets on MyMathKid are free to download and print. Answer keys are a premium feature available with a subscription.
How many Addition worksheets are available for Grade 3?: There are 6 progressive Addition lessons with worksheets for Grade 3, covering skills from foundational concepts to advanced problem solving.
Are these Addition worksheets aligned to Common Core?: Yes — Grade 3 Addition aligns with Common Core 3.NBT (Number & Operations in Base Ten).
What will my child practice with these Addition worksheets?: Your child will practice: 2-Digit Addition, 2-Digit Addition with Regrouping, 3-Digit Addition, 3-Digit Addition with Regrouping, and more.