4.MATH.4.D

Use strategies and algorithms, including the standard algorithm, to multiply up to a four-digit number by a one-digit number and to multiply a two-digit number by a two-digit number. Strategies may include mental math, partial products, and the commutative, associative, and distributive properties.

Grade 4 · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012

Standard Unwrapping

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Vocabulary
strategiesalgorithmsstandard algorithmfour-digit numberone-digit numbertwo-digit numbermental mathpartial productscommutative propertyassociative propertydistributive propertymultiplication
Skills
  • multiply (up to a four-digit number by a one-digit number using strategies and algorithms) #dok2
  • multiply (a two-digit number by a two-digit number using strategies and algorithms) #dok2
  • select (appropriate multiplication strategy or algorithm) #dok2
  • use (mental math, partial products, and properties of operations in multiplication) #dok2
  • justify (choice of multiplication strategy or solution) #dok3
Learning Targets
  • I can multiply a up to four-digit number by a one-digit number using the standard algorithm. #dok2
  • I can multiply a two-digit number by a two-digit number using strategies such as partial products or area models. #dok2
  • I can apply mental math and the commutative, associative, and distributive properties to solve multiplication problems. #dok2
  • I can justify my choice of multiplication strategy for a given problem. #dok3
  • I can explain my multiplication process and reasoning to others. #dok3
Big Ideas
  • Different strategies and properties can be used to multiply numbers efficiently and accurately.
  • Choosing the appropriate multiplication method can make solving problems easier and deepen understanding of number operations.
Essential Questions
  • What strategies can I use to multiply large numbers efficiently?
  • When should I use the standard algorithm versus another multiplication strategy?
  • How do the properties of operations help make multiplication easier?
  • How can I show and explain my multiplication thinking to others?
  • What methods help me check and justify my multiplication solutions?