Reflection: Joy How Addition and Subtraction are Related (Part 2 of 3) - Section 2: Problem Solving & Questions


There are some students who prefer the counter model over the number line.  Some of these students showed up during this lesson.  I could hear it in the "ohs and ahs" that I would hear around the room.  These students, like me, think it is really cool how the connection between subtraction and addition can be seen using red and black counters.  The procedure for using the counters to illuminate the relationship can be a bit strange.  To solve 4 - 2 why not just remove 2 black counters?  But of course, the point is not to subtract integers but to see how they relate to addition and subtraction.

  Those Who Love the Counter Model
  Joy: Those Who Love the Counter Model
Loading resource...

How Addition and Subtraction are Related (Part 2 of 3)

Unit 1: Rational Number Operations
Lesson 8 of 27

Objective: SWBAT write a difference as a sum using counters as a model

Big Idea: Students will use counters to prove that a difference can be written as a sum.

  Print Lesson
5 teachers like this lesson
Math, Number Sense and Operations, Additive inverse, add the opposite, rational numbers
  50 minutes
download 7
Similar Lessons
Subtracting Integers - How does subtraction relate to addition?
7th Grade Math » Operations with Rational Numbers
Big Idea: Subtraction does not have to be any harder than addition – students will turn all subtraction problems into addition problems and use the rules they have already mastered!
Elon, NC
Environment: Suburban
Heather Stephan
Relative Error Spiral Lesson
8th Grade Math » Statistical Spirals
Big Idea: We all make mistakes, but it is important to quantify the level of the mistake relative to the situation you are working with. This is the fundamental idea of relative error.
New York, NY
Environment: Urban
Shaun Errichiello
Integer Subtraction
7th Grade Math » Integers
Big Idea: Is subtraction the complete opposite of addition?
Columbus, OH
Environment: Urban
Jada Jackson
Something went wrong. See details for more info
Nothing to upload