Reflection: Developing a Conceptual Understanding Multiple Percents - What happens when you have a discount and tax? - Section 2: Explore


As I was sort of anticipating, many groups thought the sweater would be free!  I did not originally have this question in my lesson, I added it after block 1 (my advanced group) because they needed proof that you could not just add percents.  The 50/50 discount is a great example because it hits home with kids that stores do not just give stuff away, so you must not be able to add the percents.  I have included some video clips of groups discussing the question and trying to come up with an answer.  I only had 5 tables the whole day get the question right before I taught the lesson!

  Developing a Conceptual Understanding: Discussion Question Reflection
Loading resource...

Multiple Percents - What happens when you have a discount and tax?

Unit 3: Percents
Lesson 8 of 21

Objective: Students will be able to solve problems involving multiple percentages.

Big Idea: No no no!!! You CANNOT combine percents! In this lesson students will learn to avoid making one of the most popular percent mistakes.

  Print Lesson
11 teachers like this lesson
Math, Number Sense and Operations, percent, markup, markdown, tax, discount, 7th grade
  60 minutes
2013 04 23 12 07 06
Something went wrong. See details for more info
Nothing to upload