# Domino donuts

Purpose

The purpose of this activity is for students to apply additive and multiplicative thinking to find three addends with the same sum.

Achievement Objectives
NA3-1: Use a range of additive and simple multiplicative strategies with whole numbers, fractions, decimals, and percentages.
NA3-6: Record and interpret additive and simple multiplicative strategies, using words, diagrams, and symbols, with an understanding of equality.
Description of Mathematics

The background knowledge presumed for this task is outlined in the diagram below:

This activity should be used in a ‘free exploration’ way with an expectation that students will justify the solutions that they find.

Required Resource Materials

Set of dominoes or printable dominoes

Activity

Here are three different domino donuts.

What do you notice about the number of dots on each side of a domino donut?

Find as many different domino donuts as you can with a full set of dominoes.

Is it possible to make a donut with a side total of two?

What is the highest side total that is possible?

• The student calculates effectively to find if each side has the same sum. .