3 Digit Addition with Regrouping Unit | Expanded Form & Standard Algorithm

Save planning time with this ready-to-teach 3-digit addition unit. Designed for classroom teachers, intervention teachers, tutors, and homeschooling families, this resource includes animated teaching slides, worksheets, answer keys, and reusable templates.

The unit progresses from addition without regrouping to regrouping in one and two place value columns before introducing the standard algorithm. Teaching slides guide each lesson from start to finish and reference the accompanying worksheets, making it easy to move from whole-class teaching to independent practice.

The included expanded form templates provide valuable support for pupils who need additional help with place value and regrouping before moving to more compact written methods.

What's Included

✔ 4 ready-to-teach lessons

✔ Animated teaching slides

✔ 4 student worksheets

✔ Answer keys

✔ Expanded form templates

✔ Standard algorithm templates

Why Teachers Love This Resource

⭐ Minimal preparation required

⭐ Lessons are fully structured

⭐ Worksheets are linked directly to the teaching slides

⭐ Develops place value understanding through expanded form

⭐ Supports a smooth transition to the standard algorithm

⭐ Reusable templates for intervention, small groups, centres, and independent practice

Grades

Grades 2–4

Perfect for core instruction, intervention, maths support, and homeschooling.