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# Multimedia Presentation: Two digit by Two-digit Multiplication

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### Multimedia Presentation: Two digit by Two-digit Multiplication

1. 1. Two-Digit by Two-Digit MultiplicationUsing models to explore mathematics
2. 2. Table of Contents Rationale Curriculum Objectives Base-Ten Materials Two-Digit by Two-Digit Multiplication Student Lesson Let’s Journal! References
3. 3. Rationale Many students reach middle school without solid grounding in the concepts they need to succeed in more advanced mathematics. Multiplication is one such concept. Using models to form arrays can help students to ‘see’ multiplication and work through problems with greater understanding of the math behind the numbers.
4. 4. Curriculum ObjectiveGrade 5N5: Demonstrate an understanding of multiplication (2-digit by 2-digit) to solve problems.Achievement Indicators:1. Illustrate partial products in expanded notation for both factors.2. Represent both 2-digit factors in expanded notation to illustrate the distributive property.
5. 5. Curriculum Objective3. Model the steps for multiplying 2-digit factors using an array and base ten blocks, and record the process symbolically.4. Describe a solution procedure for determining the product of two given 2-digit factors using a pictorial representation, such as an area model.5. Solve a given multiplication problem in context using personal strategies and record the process.
6. 6. Base Ten Materials Base-Ten Materials can be a great tool when reviewing multiplication with students. By creating an array with these materials, students can ‘see’ the numbers being multiplied together and the area they form, which is the answer, or product of the two numbers. thinkmath.edc.org
7. 7. 2-Digit by 2-Digit Multiplication
8. 8. Two-Digit by Two- Digit Multiplication Build an array that shows 24 x 17. Click inside the box for the answer!
9. 9. Let’s Investigate!Build an array usingbase-ten materialsthat shows 23 x 15.
10. 10. Let’s Journal! In your journals, answer the following question. Explain your work using pictures and words. While visiting my grandmother’s farm this week-end, she asked me to collect the eggs from the henhouse. When I was finished, I had collected 23 dozen eggs. How many eggs did I collect in total?
11. 11. ReferencesAims Multimedia (Producer). (1991). The Childrens Encyclopedia of Mathematics: A Thousand and One Naughts: Multiplying Larger Numbers. [Full Video]. Available from http://www.discoveryeducation.com/The Department of Education New Brunswick: Educational Programs and Services. (2009). Grade 5 Mathematics Curriculum. Retrieved from http://www.gnb.ca/0000/anglophone-e.asp#cd on August 11, 2011.Notes: Clipart downloaded from Microsoft PowerPoint’s free clipart library. Photo used is royalty-free. A link is included below the photo for the creator’s website.