Grade 3 addition worksheets
In our grade 3 math section, we have a page dedicated to grade 3 addition. The worksheets cover mental addition, 2-digi, 3-digit and 4-digit addition, column-form addition, and addition word problems.
Mental addition worksheets
Add one-digit and two-digit numbers
These addition worksheets ask students to add one-digit and two-digit numbers in their heads.
Add one and two-digit numbers with missing addends
The next set of worksheets cover missing addends in adding one-digit and two-digit numbers.
Complete one hundred with missing addends
Students practice finding the missing addend to make a sum of 100, in their heads.
Add one two-digit and two one-digit numbers
Students face adding three numbers in these worksheets: two one-digit and one two-digit numbers.
Add three-digit and one-digit numbers
The final set of mental addition worksheets as students to add a three-digit number and a one-digit number.
Whole tens addition
Adding whole tens to two-digit numbers
Students add whole tens to two-digit numbers in these worksheets.
Adding whole tens to two-digit numbers with missing addends
Next, students practice filling in missing addends in adding whole tens to two-digit numbers.
Add two whole tens and two one-digit numbers
These worksheets provide practice in adding four numbers: two whole tens and two one-digit numbers. This is an opportunity for students to work out the sum in their heads.
Add three whole tens
Students practice adding three whole tens.
Add four whole tens
This final set of tens worksheets ask students to add four whole tens.
Whole hundred addition
Add two whole hundreds
Students add whole hundreds where all the sums are under 1,000.
Add three whole hundreds
Next, students work on adding three whole hundreds.
Adding whole hundreds with missing addends
Students practice filling in the missing addend in whole hundred addition in these worksheets.
Add to complete whole thousands
The final set of hundreds worksheets cover completing the whole thousands.
Whole thousand addition
Adding whole thousands and hundreds
These worksheets cover adding whole hundreds to whole thousands.
Adding whole thousands to a three-digit number
These harder worksheets ask students to add three-digit numbers to whole thousands.
Column-form addition
Adding two-digit numbers with no carrying
Students add two-digit numbers in columns in this first set of worksheets.
Adding two-digit numbers
Next students add two-digit numbers with regrouping.
Adding two three-digit numbers with no carrying
In these worksheets students add two three-digit numbers in columns.
Adding two three-digit numbers
These harder worksheets have students add two three-digit numbers with carrying.
Adding three three-digit numbers
Students tackle the addition of three three-digit numbers in these worksheets.
Adding four three-digit numbers
Students practice adding four three-digit numbers in columns.
Adding two four-digit numbers
We move onto four-digit numbers next. Students add two four-digit numbers in these worksheets.
Adding three four-digit numbers
These worksheets cover adding three four-digit numbers in columns.
Adding four four-digit numbers
The final set of worksheets as students to add four four-digit numbers in columns.
Addition word problems
Grade 3 addition word problems
We also have a set of worksheets that cover addition word problems at the grade 3 level.
