3.3.D.14-Identify and use arithmetic patterns to multiply-Exit Ticket

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Donald writes 6 x 9 = 54. Explain two different strategies you could use to check his work.

From EngageNY.org of the New York State Education Department. Grade 3 Mathematics Module 3, Topic D, Lesson 14. Internet. Available from https://www.engageny.org/resource/grade-3-mathemat...; accessed 21/Oct/2015.