I’m here to show you how MathReps can make subtraction practice easier and more engaging for your students. In our last post, we explored how to use a MathRep for addition, and today, we’ll focus on subtraction.
This step-by-step guide will show you how to use the MathRep template in your classroom, helping students bridge the gap between visual models and abstract concepts.
Set Up the Numbers
For this example, we’ll work with 658 and 234. The subtraction problem is set up in a pictorial model, where the number 658 is represented visually, and 234 is broken down into ones, tens, and hundreds to subtract from each place value.
Use a Pictorial Model to Subtract
In the pictorial model, each section represents a place value: ones, tens, and hundreds.
- Subtract the ones:
- Start with 8 ones and subtract 4.
- Cross out or erase 4 ones, leaving 4 ones.
- Subtract the tens:
- Start with 50 tens and subtract 30 (3 groups of ten).
- Cross out 3 groups, leaving 20 tens.
- Subtract the hundreds:
- Start with 600 hundreds and subtract 200 (2 groups of 100).
- Cross out 2 groups, leaving 400 hundreds.
Combine the remaining values:
400 + 20 + 4 = 424
Transition to the Base 10 Model
Now, transfer the pictorial model into a base 10 model by writing the numbers in expanded form:
- 658 → 600 + 50 + 8
- 234 → 200 + 30 + 4
Follow the same subtraction process:
- Subtract the ones: 8 – 4 = 4
- Subtract the tens: 50 – 30 = 20
- Subtract the hundreds: 600 – 200 = 400
Bring it all together:
400 + 20 + 4 = 424
Why This Works
This activity helps students make meaningful connections between the pictorial model and the base 10 system, reinforcing their understanding of subtraction and place value. By bridging these two models, students gain confidence in solving subtraction problems and build a deeper understanding of the math concepts.
Get Started Today!
Ready to bring this subtraction strategy to your classroom? Head over to MathReps.com to download your free MathReps template and explore more resources for effective math practice.
With MathReps, subtraction doesn’t have to be overwhelming. By providing students with a structured and visual approach, you’re setting them up for success in their math journey. Let us know how it works for your students!
Nowa Techie 