Bring excitement to your algorithm addition lessons with our Three-Digit Add One-Digit World of Adventure Worksheets. These engaging code breaker worksheets are designed to build fluency with written addition while offering a motivating twist. As students solve each problem, they unlock secret items that help build their very own world of adventure!

Students work through a series of three-digit plus one-digit addition problems using standard vertical algorithms. After completing the calculations, they use the answers with a number-to-letter code to reveal a hidden attraction or amenity. From splash parks to lookout towers, the revealed items are added to a recording and planning sheet, helping students track their progress while fuelling imagination and ownership of their learning.

Three differentiated versions are included to suit a wide range of ability levels. The first version contains problems with no regrouping, the second includes some regrouping, and the third mostly requires regrouping. This allows for targeted differentiation, extension opportunities, or progression through all three versions. Whether used during rotations, independent tasks or whole-class warm-ups, this flexible resource keeps addition practice fun and purposeful.

Key Learning Outcomes:

• ✅ Solve three-digit plus one-digit addition problems using vertical algorithm strategies
• ✅ Apply regrouping skills when required
• ✅ Use number-to-letter codes to decode secret items
• ✅ Build fluency and confidence in written addition
• ✅ Track progress and promote ownership through world-building

What’s Included:

• 3 differentiated worksheets:
  • - Version 1: no regrouping
  • - Version 2: some regrouping
  • - Version 3: mostly regrouping
• Code key to decode mystery items
• World of Adventure recording and planning sheet

Materials Needed:

• Printed worksheets and planning sheet
• Pencils or pens
• Optional: coloured pencils or markers for map creation

How to Use:

1. Distribute the worksheet version that matches your students’ level.
2. Students solve the three-digit plus one-digit problems using vertical algorithms.
3. Using the provided code key, they decode the name of a hidden item.
4. They record and add this item to their personal World of Adventure planning sheet.
5. Encourage students to complete more worksheets in the series to build out their world and collect more items.

Ideas for Classroom Use:

• 💡 Use as a maths rotation station for independent or partner work
• 💡 Assign different versions to provide targeted practise based on ability
• 💡 Use as an engaging assessment tool to check understanding of regrouping
• 💡 Display student-created worlds to celebrate progress and creative thinking
• 💡 Turn into a whole-class challenge by tracking which items have been unlocked across the room

Top Teacher Tips:

• 💛 Print planning sheets in A3 for extra space and creativity
• 💛 Encourage neat vertical alignment to support place value understanding
• 💛 Use as an early finisher or homework option to continue building fluency
• 💛 Reinforce the connection between algorithm practise and real-world fun by encouraging storytelling with each new item

Three-Digit Add One-Digit World of Adventure Worksheets provide purposeful, differentiated addition practise with a fun twist. With code-breaking, world-building, and algorithm mastery all in one, this resource is the perfect blend of structure and imagination.