Support your students in developing number sense and conceptual understanding with our clear and effective Part Part-Whole Addition of 2-Digit Numbers Worksheets! These structured worksheets give students meaningful practice with the part-part-whole model – a key strategy for visualising and solving addition problems with two-digit numbers.

Students will complete each diagram by combining the two ‘parts’ and recording the ‘whole’ total. Below the model, they will write a matching number sentence that reinforces their understanding of how parts combine to make a whole. This scaffolded approach encourages flexible thinking and supports the development of efficient mental and written addition strategies.

Part Part-Whole Addition of 2-Digit Numbers Worksheets are ideal for targeted number lessons, maths rotations or independent consolidation tasks. They can be used to differentiate support, reinforce concrete understanding or extend capable students through number exploration and reverse problems.

Key Learning Outcomes:

• ✅ Use part-part-whole models to represent and solve addition problems
• ✅ Understand the relationship between parts and wholes in number combinations
• ✅ Strengthen place value understanding by adding tens and ones
• ✅ Write and interpret number sentences to match diagrams
• ✅ Build flexible mental strategies for adding two-digit numbers

What’s Included:

• Printable part-part-whole addition worksheets
• Multiple 2-digit addition problems per page
• Space to complete diagrams and record matching number sentences

Materials Needed:

• Printed worksheets (on paper or card)
• Pencils and erasers
• Optional: base-ten blocks, counters or number lines for visual support

How to Use:

1. Introduce the part-part-whole concept using concrete materials or a sample diagram.
2. Students complete each problem by adding the two parts and recording the total in the whole section.
3. They write a matching number sentence below each diagram to show their working.
4. Encourage discussion of strategies used, such as breaking numbers into tens and ones.

Ideas for Classroom Use:

• 💡 Add to your maths rotations for targeted number strategy practice
• 💡 Use for differentiated support in small groups or intervention settings
• 💡 Assign as a consolidation task following explicit teaching on addition

Teacher Tips:

• 💛 Use manipulatives like base-ten blocks or counters to help visual learners combine parts
• 💛 Reinforce the idea that the order of the parts can change – encourage students to swap them and still reach the same whole
• 💛 For an extension task, challenge students to reverse the process: give them the ‘whole’ and ask them to generate possible ‘part’ combinations
• 💛 Invite students to create their own part-part-whole diagrams for a partner to solve – great for peer teaching and assessment

Part Part-Whole Addition of 2-Digit Numbers Worksheets provide clear, structured practice for essential addition strategies – helping students connect concrete thinking with abstract number understanding in a way that builds lasting confidence.