# Winter Progress Monitoring and Instructional Strategies for 4.OA.3

Standard:
Apply properties of operations as strategies to multiply and divide.  Examples:  if 6 x 4 = 24 is known, then 4 x 6 = 24 is also known.  (Commutatve property of multiplication.)  3 x 5 x 2 can be found by 3 x 5 = 15, then 15 x 2 = 30, or by 5 x 2 = 10, then 3 x 10 = 30. (Associative property of multiplication.) Knowing that 8 x 5 = 40 and 8 x 2 = 16, one can find 8 x 7 as 8 x (5 + 2) = (8 x 5) + (8 x 2) = 40 + 16 = 56. (Distributive property).

Progress Monitor:
Present student with a multiplication or division problem and note solution strategy that uses place value, base ten or properties within 100 or relational thinking with one-digit by one-digit multiplication.

Instructional Strategies (Addressing multiplication and division within 100)

• Van de Walle, p. 113-118 of Teaching Students Mathematics Grades 3-5
• Number Talks, Parrishstrategy selections from Chapter 7
• Developing Number Concepts, Kathy Richardson Book 3, Ch. 2 Activities 2.17, 2.21, 2.14