Learning Domain: Number and Operations in Base Ten
Standard: Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models. (Grade 4 expectations in this domain are limited to whole numbers less than or equal to 1,000,000. A range of algorithms may be used.)
Degree of Alignment:
Not Rated
(0 users)
Cluster: Use place value understanding and properties of operations to perform multi-digit arithmetic
Standard: Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models. (Grade 4 expectations in this domain are limited to whole numbers less than or equal to 1,000,000. A range of algorithms may be used.)
Degree of Alignment:
2.3 Strong
(3 users)
These 2 "alternate multiplication algorithms" (lattice multiplication and Napier's Bones) are fun, cool ways for students to multiply multi-digit numbers. However the connection to a place value or base-ten model isn't clear, but possibly could be made. The standard asks for place value models, array model or equations, so it's not a clear connection. However it works and the resources (attachments) are helpful. I would caution teachers from using these only because although they work, they don't lead to an understanding of multiplication as a concept.