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Three-Digit Addition Worksheets

This page contains 3-digit addition exercises like addition drills, place value blocks, finding the correct addends, adding more than two addends, missing digits, treasure box, and more. You have options to select from horizontal or vertical; regrouping or no regrouping; with or without word problems.

3-Digit and 2-Digit

The addends are 3-digit and 2-digit. Problems assigned in four categories: regrouping, no regrouping, with or without word problems.

3-digit and 2-digit: Addition Drill

No Regrouping:

Sheet 1 | Sheet 2 | Sheet 3 | Sheet 4 | Sheet 5

No Regrouping with Word Problems:

Sheet 1 | Sheet 2 | Sheet 3 | Sheet 4 | Sheet 5

Regrouping:

Sheet 1 | Sheet 2 | Sheet 3 | Sheet 4 | Sheet 5

Regrouping with Word Problems:

Sheet 1 | Sheet 2 | Sheet 3 | Sheet 4 | Sheet 5

Adding 3-digit Numbers with Word Problems

Each worksheet has twelve standard three-digit addition problems and two word problems.

2-digit and single-digit: Lattice Multiplication

No Regrouping:

Sheet 1 | Sheet 2 | Sheet 3 | Sheet 4 | Sheet 5

Regrouping:

Sheet 1 | Sheet 2 | Sheet 3 | Sheet 4 | Sheet 5

Column 3-digit Addition Drill: No Regrouping

Each problem in this worksheet has 3-digit no regrouping addends in columns. You may set a time limit before working on the drill.

Three-digit Column Addition Drill: No Regrouping

15 per page: Sheet 1 | Sheet 2 | Sheet 3

25 per page: Sheet 1 | Sheet 2 | Sheet 3

50 per page: Sheet 1 | Sheet 2 | Sheet 3

Column 3-digit Addition Drill: Regrouping

Explore your skills in addition by practicing these regrouping addition drills.

Three-digit Column Addition Drill: Regrouping

15 per page: Sheet 1 | Sheet 2 | Sheet 3

25 per page: Sheet 1 | Sheet 2 | Sheet 3

50 per page: Sheet 1 | Sheet 2 | Sheet 3

Horizontal 3-digit Addition Drill: No Regrouping

The worksheets have 3-digit addends in rows. Regrouping is not required. You may select from 15, 25 and 50 per page.

Three-digit Horizontal Addition Drill: No Regrouping

15 per page: Sheet 1 | Sheet 2 | Sheet 3

25 per page: Sheet 1 | Sheet 2 | Sheet 3

50 per page: Sheet 1 | Sheet 2 | Sheet 3

Horizontal 3-digit Addition Drill: Regrouping

Practicing these drills will provoke your adding skills. Regrouping required.

Three-digit Horizontal Addition Drill: Regrouping

15 per page: Sheet 1 | Sheet 2 | Sheet 3

25 per page: Sheet 1 | Sheet 2 | Sheet 3

50 per page: Sheet 1 | Sheet 2 | Sheet 3

Addition with Base Ten Blocks

Write the number represented by flats, rods and units. Find the sum using place value blocks.

3-digit Addition: Base Ten Blocks

Sheet 1 | Sheet 2 | Sheet 3

Circle the Numbers

Each worksheet has 10 problems finding correct addends that make the required sum.

Three Digit Addition Activity

Sheet 1 | Sheet 2 | Sheet 3

Treasure Box

Each problem has a treasure box without a number. Find the missing addends.

3-digit addition Activity: Finding the Missing Number

Easy: Sheet 1 | Sheet 2 | Sheet 3

Medium: Sheet 1 | Sheet 2 | Sheet 3

Missing Digits

Each worksheet has 20 problems. Find the missing digits in each problem. Easy level has two digits missing. Medium level has three digits missing.

Find the Missing Digits: Three Digit Addition

Easy: Sheet 1 | Sheet 2 | Sheet 3

Medium: Sheet 1 | Sheet 2 | Sheet 3

Adding More Addends

3-digit addition worksheets are based on adding more than two addends (three, four and five).

3-digit Addition: More Addends

Three Addends: Sheet 1 | Sheet 2 | Sheet 3

Four Addends: Sheet 1 | Sheet 2 | Sheet 3

Five Addends: Sheet 1 | Sheet 2 | Sheet 3