math · Grade 2
Exchange a Ten to Subtract
Exchange one ten for ten ones in subtraction.
Find this activity in the mathematics map
Explore the related learning targets, foundations and possible next connections.
Learning goals
- Exchange one ten for ten ones in subtraction.
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 previewExchange a Ten to Subtract
Practice · Independent · 25 min
Exchange one ten for ten ones in subtraction. A complete set with exploration, practice and application. Use the linked unit for the learning sequence and teaching guide.
1. Explore
Practice previewExchange a Ten to Subtract: Explore and Explain
Explore · Independent · 10 min
Exchange one ten for ten ones in subtraction. A focused learn activity. Use the linked unit for the learning sequence and teaching guide.
2. Practice
Practice previewExchange a Ten to Subtract: Practice Independently
Practice · Independent · 10 min
Exchange one ten for ten ones in subtraction. A focused practice activity. Use the linked unit for the learning sequence and teaching guide.
3. Apply
Practice previewExchange a Ten to Subtract: Apply and Create
Apply · Independent · 15 min
Exchange one ten for ten ones in subtraction. 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: Rewrite 51 as tens and ones so there are at least 8 ones.
- Connect the response to: Solve 72 - 46.
- Ask students to apply the idea: Use addition to check 61 - 27 = 34.
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.