3rd Grade Math Worksheets: Addition

Free addition worksheets from K5 Learning

Our 3rd grade addition worksheets include both "mental addition problems" intended for students to solve in their heads and multi-digit column form addition questions giving practice in computational skills.   These grade 3 math worksheets compliment our online math program.

Mental Addition

 

 

Example

Add two 2-digit numbers - one addend is a whole ten
  20 + 39 = ___
   
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 a 3-digit number and a 1-digit number
  865 + 5 = ___

 
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 thousands to another number   6,349 + 4,000 = ___

Column-form addition

 
Adding two 2-digit numbers, no carrying

 

22

+ 23


Adding two 2-digit numbers

 

38

+ 27


Adding two 3-digit numbers, no carrying

 

123

+ 234


Adding two 3-digit numbers  

216

+ 955


Adding three 3-digit numbers

 

342

+ 123

+ 456


Adding four 3-digit numbers

 

456

+ 123

+ 567

+ 890


Adding two 4-digit numbers

 

5,432

+ 1,543


Adding three 4-digit numbers

 

9,002

+ 1,004

+ 2,567


Adding four 4-digit numbers

 

1,111

+ 2,222

+ 3,333

+ 4,444


Grade 3 Addition Worksheet Printable

 

 

 

Sample Grade 3
Addition Worksheet

 

Answers provided on
2nd page

 

Multiple versions of
each worksheet

 

All worksheets
are pdf documents

 

 

 

 

 

 

 


Recommended Workbooks

Browse our bookstore where we sell downloadable workbooks. 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.

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