Digital Math for Kindergarten | Decomposing Numbers Activities | Google Slides™

Digital Math for Kindergarten | Decomposing Numbers Activities | Google Slides™ | Ontario 2026 Aligned

Looking for interactive kindergarten decomposing numbers activities you can use for digital math centers, whole-group lessons, or distance learning?

This Google Slides™ decomposing numbers resource gives your students hands-on drag-and-drop practice breaking numbers apart into two and three parts.

Students explore part–part–whole relationships, represent decompositions with digital manipulatives, complete number sentences, and solve simple word problems.

 

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Perfect for:

✔ Whole-group teaching on the SMARTBoard or projector
✔ Digital math centers
✔ Google Classroom assignments
✔ Distance learning
✔ Hybrid classrooms

 

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What’s Included:

 

⭐ Lesson Slides (Slides 1–3)

Introduce and teach:

• What does it mean to decompose a number?
• How can numbers be broken into parts?

👆 Use these slides for direct instruction before independent practice.

 

⭐ Decompose 5 (Slides 4–15)

Students:

• Look at digital manipulatives (counters, shapes)
• Drag objects to represent parts
• Fill in the blanks to complete the number sentence
• Read their completed equation

Focus: Decomposing 5 into 2 parts using multiple representations.

 

⭐ Decompose 6–10 (Slides 16–35)

Students decompose:

• 6
• 7
• 8
• 9
• 10

Using digital:

• Cubes
• Bears
• Jellybeans
• Linking chains
• Counters

Students drag digital manipulatives and complete matching number sentences to build flexible thinking and strengthen number relationships.

 

⭐ Make Your Own (2 Parts) (Slides 36–42)

Students:

• Choose their own number
• Drag digital manipulatives to represent it
• Type the matching decomposing sentence

Encourages independence and differentiation.

 

⭐ Decomposing into 3 Parts (Slides 43–50)

Direct instruction slide introducing decomposing into more than 2 parts.

Students:

Break numbers 5–10 into 3 parts
Drag manipulatives to represent their thinking
Complete the matching equation

Builds deeper conceptual understanding.

 

⭐ Make Your Own (3 Parts) (Slides 51–57)

Students:

• Choose a number
• Decompose into 3 parts
• Represent visually and symbolically

Encourages flexibility and repeated practice.

 

⭐ Problem Solving (Slides 58–63)

Students solve 6 word problems:

• 4 problems decomposing into 2 parts
• 2 problems decomposing into 3 parts

Students model the situation and complete the equation.
Strengthens mathematical reasoning and communication.

 

⭐ Alternate Equation Format Included

An alternate version using:

___ = ___ and ___

is included so you can choose the sentence format that best fits your classroom.

 

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Why Teachers Love This Resource

✔ No prep — just assign or project
✔ Engaging drag-and-drop format
✔ Builds deep part–part–whole understanding
✔ Clear progression from 2 parts to 3 parts
✔ Reinforces number sentence structure
✔ Works for in-person OR digital classrooms
✔ Ontario-aligned

 

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Curriculum Alignment (Ontario 2026)

Supports: A6.5 — Decompose quantities to 10

This resource has been reviewed and confirmed to aligned with the 2026 Ontario Kindergarten Math Curriculum.

 

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Tech Tips:

• Use in EDIT mode (not Present mode) so movable pieces work.
• If assigning in Google Classroom, students using iPads/tablets must have the Google Slides app installed to manipulate pieces.
• You may also download as a PowerPoint file to use on a SMARTBoard.

 

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Try Before You Buy!

Not sure if this format works for you?

Grab my FREE Digital Math for Kindergarten | Tally Marks | Google Slides™ to try it for free first.

 

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If you love this resource, be sure to check out my other Digital Math for Kindergarten activities or my complete, year-long digital math program💛