Addition and subtraction problems

Addition and subtraction

Students can scan the QR code to start!

Session Overview

In this last module session we will address all the previous sessions with an interactive problem solving session. The student will get to use all the knowledge acquired in the first sessions and solve some basic problems.

15-20 min

  • Agility and control over addition and subtraction
  • Understanding of the operations application
  • Introductory session M0, session S1 and S2 for 3rd-5th grade students. No heavy knowledge of the Polyup platform is needed.
Getting students ready
  1. Students should go to
  2. Students should go to on their computer, tablet or smartphone.
    • They should click on the play button to access the Polyup environment.
    • If they have an account, they can sign in with their username or email, if not, they should create a student account.
    • Students should click on Poly at the bottom and enter the following code: (M7PCARP)
Starting the session
  1. The teacher should put the introductory presentation in front of the class (including the video introducing stacks).
  2. Students, with the problems given, should try to accomplish a result accordingly to the one given in chip solutions.
  3. After 5 minutes, the teacher should put the result of the problem in the board.
  4. * The problems are made to be done all in one session and in order.

** To know more about how to assign machines (the session) as homework on google classroom visit the following article

  • Find the session solutions on the Teacher’s Manual!