Teaching the standard algorithm for 3-digit addition can feel simple… until regrouping shows up and half the class freezes.

I created this step-by-step visual because my students needed something clear, predictable, and consistent to reference — without me reteaching it every time.

This resource breaks down 3-digit by 3-digit addition with regrouping into manageable steps that students can actually follow independently.

The anchor chart version is perfect for your math wall, and the student version is already formatted 4-to-a-page so you don’t have to fight your copier settings.

Just print and cut.

What’s included:

• Full-size teacher anchor chart
• Student reference copies (4 per page)
• Clear regrouping reminders
• Estimation check modeled by rounding to the hundreds place
• Optional expanded form example

I use this alongside my subtraction algorithm poster to keep our strategy language consistent across operations. It helps students see the structure instead of treating addition and subtraction like completely different worlds.

If your students struggle with regrouping or constantly forget what to do next, this gives them a steady visual they can rely on.

Students can follow each color-coded step independently, which promotes confidence and reduces repeated questions. Use this as a classroom mini-poster, anchor chart, or student checklist for guided or independent practice.

Reminders:

• For personal classroom use only.
• Do not share, copy, or sell this resource.
• Non-editable; cannot be included in other products.
• © SomewhereOverInSydneyland – thank you for respecting my work!