MyMathKidK-8 Curriculum

3-Digit Addition

Add 3-digit numbers without regrouping

What You'll Learn

  • Add hundreds, tens, and ones
  • Line up numbers correctly
  • Work from right to left

📖Adding 3-Digit Numbers

With 3-digit numbers, add ones, then tens, then hundreds. 234 + 152 = 386. Start at the right and work left.

💡

Use lined paper to keep your columns straight!

Practice Worksheets

3-Digit Addition (Set A)

Add 3-digit numbers without regrouping

8 problems
Start

3-Digit Addition (Set B)

More 3-digit addition practice

8 problems
Start

3-Digit Addition (Set C)

Additional 3-digit practice

8 problems
Start

3-Digit Addition (Set D)

Keep practicing 3-digit addition

8 problems
Start

3-Digit Addition (Set E)

Master 3-digit addition

8 problems
Start
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2-Digit Addition with Regrouping
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3-Digit Addition with Regrouping