4th Grade Multiplication Strategy

Using place value disks to represent multiplying 2 - 4 digit numbers by 1 digit numbers and to explain the

standard algorithm.

Step 1 - Decompose the number being multiplied

Step 2 - Create a Place Value Chart

Step 3 - Represent the problem with place value disks

Step 4 - Represent multiplication with disks and numbers

Here’s How it works for a bigger number

Now let’s try one with regrouping

And more regrouping

In ConclusionThe Pros

Using place value disks helps students build their understanding of place value.

Decomposing the numbers shows students how they can use the associative property for paper and mental calculations.

Regrouping using place value disks helps students understand what is happening when they begin to use the standard algorithm.

The Cons

Drawing the place value models is time consuming and if kids get confused drawing the disks they get errors.

Find it online in Module 3 from Engage NY at https://www.engageny.org/resource/grade-4-mathematics