Base 10 Blocks on Jamboard for Subtraction

This post provides access to and details about a Google Jamboard with scaffolded background to support multi-digit subtraction with regrouping.

The Jamboard

The Jamboard has images of basic base 10 blocks. The background provides side by side tables for numbers and for blocks. Additional blocks are set aside for regrouping. Here is a FB Reel and a YouTube video showing how to use this artifact.

Access to the Jamboard

Here is a link. You need to make a copy to access it

Base 10 Chart for Multiplication

Base 10 blocks are a go to representation for place value. They are also easy to implement for addition or subtraction with place. With a group model, they are useful for multiplication and division. It is harder to model multiplication of multi-digit numbers with regrouping. This post presents a Google Jamboard with base 10 blocks on a scaffolded chart to provide such a model.

Overview

The structure aligns with the group representation of multiplication. The # of items in each group is presented first as this aligns with unit rate and slope problems.

Steps

The steps are listed in each photo in the gallery below. Here is a Youtube and FB Reel video showing the steps.

Access to Jamboard

Here is a link to the Jamboard. You must make a copy to access it.

Individualized Base 10 Blocks

Students who struggle with number sense, such as place value, struggle with subsequent math content. Connecting place value to prior knowledge or an area of interest can be an entry point to making place value accessible. This post shows how a student interest (horses) can be leveraged to present place value in a more accessible fashion.

The student likes horseback riding. This can be useful to make the concept relative (10 horses live in a barn) and engaging. Here is a YouTube video and a FB Reel showing how this works. The key is 10 horses can “enter” the barn and disappear.

Additional Forms

The Jamboard has a slide with a Legos version. This allows a nice transition from using actual Legos as the 1×1 blocks can connected to make a 10.

Here is a link to the Jamboard. You have to make a copy to use.