math · Grade 2
Understand Regrouping in Addition
Exchange ten ones for one ten when adding two-digit numbers.
Find this activity in the mathematics map
Explore the related learning targets, foundations and possible next connections.
Learning goals
- Exchange ten ones for one ten when adding two-digit numbers.
Before you begin
Understand the words and representations introduced in the Explore activity.
Age and grade do not measure readiness. Adjust reading or adult support to preserve the intended learning goal.
Follow the sequence
Complete practice
Practice previewUnderstand Regrouping in Addition
Practice · Independent · 25 min
Exchange ten ones for one ten when adding two-digit numbers. A complete set with exploration, practice and application. Use the linked unit for the learning sequence and teaching guide.
1. Explore
Practice previewUnderstand Regrouping in Addition: Explore and Explain
Explore · Independent · 10 min
Exchange ten ones for one ten when adding two-digit numbers. A focused learn activity. Use the linked unit for the learning sequence and teaching guide.
2. Practice
Practice previewUnderstand Regrouping in Addition: Practice Independently
Practice · Independent · 10 min
Exchange ten ones for one ten when adding two-digit numbers. A focused practice activity. Use the linked unit for the learning sequence and teaching guide.
3. Apply
Practice previewUnderstand Regrouping in Addition: Apply and Create
Apply · Independent · 15 min
Exchange ten ones for one ten when adding two-digit numbers. A focused apply activity. Use the linked unit for the learning sequence and teaching guide.
Download the unit pack
Numbered activities, separate answer keys and a teaching guide in one ZIP. The pack uses the focused sequence; the complete practice sheet above is an alternative.
Teaching and response guide
- Begin with: How many tens and ones equal 13 ones?
- Connect the response to: Solve 48 + 16.
- Ask students to apply the idea: Solve 23 + 14. Is exchanging ten ones necessary?
Watch for: Accepting an answer without checking whether it uses the material and satisfies the requested relationship or criteria.
Check the answer criteria for each task. A supported explanation may have more than one acceptable response. These activities offer evidence to discuss; completing a sheet alone does not establish mastery.
Possible next goals
Choose the next unit when its prerequisites fit your learner.