Donut Delight is a Problem Based Lesson created by the Make Math Moments team.

In this task, students will determine the number of Krispy Kreme donuts in a large box given the dimensions of the box in donuts. Students will be multiplying 2-digit by 2-digit numbers without the use of a calculator. The arrangement of donuts in an array might encourage students to use the array model as a tool for determining the number of donuts. Students should be able to use the image in order to defend their calculations. Meaning, if students use a standard algorithm, are they able to see their partial products within the array?

Some of the big ideas that will likely emerge in this task include:

• Creating and/or flexibly redefining the unit (unitizing).
• Repeated additions can be regrouped.
• The relationship between rows and columns in an array.
• Numbers can be composed and decomposed.
• The distributive property of multiplication over addition and over subtraction.
• The associative property of multiplication.

NOTE: This task uses digital resources such as

• Videos;
• Images;
• Slide shows; and,
• animations.

All digital resources can be found at: https://learn.makemathmoments.com/task/donut-delight/

This task is Day 1 of a 5 day unit on multiplication and division. You can access the remaining days and resources in the Make Math Moments Academy

Discover more tasks for your classroom at https://makemathmoments.com/tasks/