3rd Grade Math Worksheets: Addition

Free math worksheets from K5 Learning

For practicing some math skills, there is just nothing more effective than a pencil and paper. Our grade 3 additioin worksheets compliment our K5 Math and K5 Math Facts online math programs.

Using our math worksheets:

Each time you refresh the screen, the worksheet will change - you can create an infinite number of different worksheets of any type. Answer keys are available by clicking at the bottom of each worksheet.

 

Addition Example
Complete one hundred (missing addend)
____ + 6 = 100
Add two 2-digit numbers - one addend is a whole ten
20 + 39 = ___
Add two 2-digit numbers - one addend is a whole ten - missing addend 20 + ___ = 59
      
Add a 1-digit number to a 2-digit number
94 + 7 = ____
Add a 1-digit number to a 2-digit number - missing addend 91 + __ = 96
       
Adding one 2-digit number and two one-digit numbers
3 + 41 + 9 = ___
Adding a 3-digit number and a 1-digit number
865 + 5 = ____

Add two whole tens and two one-digit numbers
50 + 8 + 7 + 50 = ____
Adding whole tens (3 addends)
60 + 50 + 40 = ____
Adding whole tens (4 addends)
40 + 10 + 10 + 60 = ____
Adding whole hundreds (2 addends) 300 + 100 = ___
Adding whole hundreds (3 addends) 200 + 100 + 700 = _____
Adding whole hundreds - missing addend
______ + 500 = 1300
Completing a whole thousand (whole hundreds are missing) 700 + ______ = 1000

 
Adding two numbers with thousands and whole hundreds 4500 + 1400 = _____
Adding whole thousands to another number 6349 + 4000 = _____
  
     
Column-form addition
Adding two 2-digit numbers

94

+ 20

Adding two 2-digit numbers, no carrying

22

+ 23

Adding two 3-digit numbers

123

+ 234

Adding three 3-digit numbers

342

+ 123

+ 456

Adding four 3-digit numbers

456

+ 123

+ 567

+ 890

Adding two 4-digit numbers

5432

+ 1543

 

Adding three 4-digit numbers

9002

+ 1004

+ 2567

Adding four 4-digit numbers

1111

+ 2222

+ 3333

+ 4444

Acknowledgments: Our worksheets are provided courtesy of Home School Math.

Recommended Workbooks

Browse our bookstore where we sell downloadable workbooks recommended for home study. The workbooks contain both instruction and exercises, with answer keys, and are organized into short topical sections. Ideal for independent or parent led-studying, in our opinion.

What is K5?

K5 Learning is an online reading and math program for kids in kindergarten to grade 5. Kids work at their own level and their own pace through a personalized program of over 3,000 online tutorials and activities.

Designed principally for after school study and summer study, K5 is also used by homeschoolers, special needs and gifted kids. K5 helps your children build good study habits and excel in school. 

Free trial

K5 Learning offers a 14-day free trial of its complete program. The free trial includes optional free reading and math assessments.

Start 14 Day Free Trial