Reflection: Connection to Prior Knowledge Multiplication As Repeated Addition - Section 4: Try It Yourself


Some of my students realized early on it was easier to solve problems by using their knowledge of doubles to add (MP2 - Reason abstractly and quantitatively).  They were using doubles, and then doubling the doubles.  3 + 3 = 6, 6 + 6 = 12, 12 + 12 = 24, etc.

Another group realized it was easier to use skip counting, especially with twos and fives.   One boy remembered a chant or song for skip counting by fours.

One team found it was easier to draw out a model which demonstrated equal groups and created their own visual model.  This group did include an ELL student so she was applying a strategy she knew would help her to be successful in math. 

Because the students chose different ways for solving based on their prior knowledge, I would change how I taught this lesson in the future by using more modeling of repeated addition including number lines, focus on counting the groups of manipulatives, and include skip counting in the warm up.  This would keep the focus on skip counting for repeated addition to reach the total number. 

  Use Doubles
  Connection to Prior Knowledge: Use Doubles
Loading resource...

Multiplication As Repeated Addition

Unit 1: Multiplication
Lesson 3 of 6

Objective: SWBAT to interpret the product of whole numbers as the total number of objects in equal groups using addition.

Big Idea: Multiplication as adding the same amount over and over and over.

  Print Lesson
5 teachers like this lesson
  50 minutes
400px rows of cookies
Similar Lessons
Grandma's Cookie Production Company
3rd Grade Math » Understanding Division
Big Idea: Children need to understand the two types of division, sharing and measuring/grouping. This lesson will allow them to explore strategies to solve for quotients using manipulatives.
Troy, MI
Environment: Suburban
Michelle Marcus
Quotients - Just the Basics
3rd Grade Math » Introduction to Basic Division
Big Idea: Just like multiplication, addition, and subtraction, division problems involve patterns and there are methodical ways in which manipulatives can be used to solve division problems with small dividends and divisors of 1 through 10.
Tucson, AZ
Environment: Urban
Jennifer Valentine
Discovering Relationships: Multiplication & Division (1 of 2)
3rd Grade Math » The Relationship Between Multiplication and Division
Big Idea: Fact families include the same amount of total objects but the groups and number in each group can be manipulated.
Environment: Urban
Sarah Maffei
Something went wrong. See details for more info
Nothing to upload