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Adding two-digit numbers can be overwhelming for young learners – especially when they’re expected to solve problems without relying on concrete tools like base ten blocks.
That’s why the addition break apart strategy is such a helpful next step.
This strategy breaks numbers into tens and ones, helping students visualize the place value and build confidence in their ability to add.
If your students are ready to move beyond manipulatives but still need structure, the addition break apart strategy is a perfect fit.
Let’s walk through how to teach it, what to watch for, and how you can save time with done-for-you resources that reinforce the method step-by-step.
What Is the Addition Break Apart Strategy?
The addition break apart strategy – sometimes called the partial sums strategy – is all about breaking numbers into their place value parts before adding.
Here’s an example:
24 + 54
To start, students break each number into tens and ones.
24 becomes 20 and 4
54 becomes 50 and 4
Using boxes to organize each part can make a huge difference, especially when students are first learning.
In fact, I always recommend using visual scaffolds to help them stay on track.
Want to skip the prep work?
My ready-to-use practice pages already include these built-in supports to guide your students from start to finish.
Step-by-Step: How to Model the Strategy
Let’s break it down.
Step 1: Break Apart the Numbers
Start by modeling how to split each number into tens and ones.
Use a place value chart or boxes to show how 24 becomes 20 and 4, and 54 becomes 50 and 4.
Watch out for a common mistake here – many students will write 2 instead of 20, or 5 instead of 50.
Correcting this early helps reinforce their place value understanding.
Step 2: Add the Ones
Have students write the number sentence:
4 + 4 = 8
It’s tempting for them to do this step in their heads, but showing their work is key – especially as problems get more complex.
Step 3: Add the Tens
Now add 20 + 50 = 70.
Again, encourage students to write out the number sentence.
Step 4: Combine the Partial Sums
Finally, add the two partial sums:
70 + 8 = 78
Circle the final answer to show that all steps are complete.
Using a consistent structure like this helps students feel successful.
If you need no-prep pages with this exact format, my printable resource walks students through each part of the addition break apart strategy.
Why the Addition Break Apart Strategy Works
This strategy builds more than just accuracy – it builds understanding.
Students aren’t memorizing a set of steps; they’re seeing how place value works in action.
It also supports differentiation.
Some students may still need visual boxes and scaffolded steps, while others can draw their own or even solve mentally.
The addition break apart strategy allows you to meet each student where they are.
If your class has a mix of learners, my resource is designed with this in mind.
It offers structured support without overwhelming students – and gives you more time back in your day.
Watch How to Teach this Strategy
Reinforce the Strategy with Ready-to-Use Practice
If you’re looking for an easy way to reinforce the addition break apart strategy in your classroom, I’ve got you covered.
My 2-digit addition without regrouping resource includes:
✅ Step-by-step visual scaffolds for the break apart method
✅ Practice problems that build confidence and consistency
✅ A clear layout so students stay organized and focused
You’ll be able to support all levels of learners without needing to create a thing from scratch.
Want to try this strategy with your students before committing to the full resource?
Download the free sample worksheets and see how it works in your classroom.
Need help or have questions?
If you need help or have questions, the easiest way to reach me is to DM me on Instagram @techieturtleteacher.
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