From EngageNY.org of the New York State Education Department. Grade 5 Mathematics Module 2, Topic B, Lesson 5. Internet. Available from https://www.engageny.org/resource/grade-5-mathemat...; accessed 15/Oct/2015.
Question 1
1.
Draw an area model, and then solve using the standard algorithm. Use arrows to
match the partial products from the area model to the partial products in the
algorithm.
21 x 23 = _________