4.OA.4
Building Prime and Composite Numbers
You will need: 24 color tiles/counters, grid paper, Building Prime and Composite Numbers table
1. Use the counters to make as many different
arrays as you can for the number 24.
2. Draw your arrays on the grid paper.
3. Use your arrays to help you complete the
Building Prime and Composite Numbers table.
4. Repeat with the number 11.
5. Repeat with three different numbers of your
choice.
Building Prime and Composite Numbers
Number
24
11
Factors
Number
Prime or
of Arrays Composite?
How do you know?