From EngageNY.org of the New York State Education Department. Grade 3 Mathematics Module 3, Topic A, Lesson 4. Internet. Available from https://www.engageny.org/resource/grade-3-mathemat...; accessed 21/Oct/2015.
Sylvia solves 6 × 9 by adding 48 + 6. Show how Sylvia breaks apart and bonds her
numbers to complete the ten. Then, solve.