From EngageNY.org of the New York State Education Department. Grade 3 Mathematics Module 1, Topic A, Lesson 3. Internet. Available from https://www.engageny.org/resource/grade-3-mathemat...; accessed 20/July/2015.
Draw an array that shows 5 rows of 3 squares. Then, show a number bond where
each part represents the amount in one row.