Reflection: Adjustments to Practice Integer Product Signs - Using Counters to Discover Signs of Products - Section 1: Introduction


I love this model for showing multiplication of integers.  When I first saw this method my mind was blown.  Not so much the multiplying a positive by a positive or a positive by a negative.  It was multiplying a negative by a negative and a negative by a positive that I thought was cool.

That being said, I'm not convinced this is the most efficient way to teach students about signs of products.  Maybe patterns is a better way.

-3 * 2 = -6

-3 * 1 = -3

-3 * 0 = 0

-3 * -1 = ?

-3 * -2 = ?


  Is This the Most Effective Model for Integer Products?
  Adjustments to Practice: Is This the Most Effective Model for Integer Products?
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Integer Product Signs - Using Counters to Discover Signs of Products

Unit 1: Rational Number Operations
Lesson 12 of 27

Objective: SWBAT determine if the product of two integers is positive or negative using counters to represent equal groups

Big Idea: Students use integer counters to model products of positive and negative integers.

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16 teachers like this lesson
Math, Number Sense and Operations, multiplication, products, integer products, signs of products, counters, modeling integer products, rational numbers
  50 minutes
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