Commutative Project - Chalk Number Line
Welcome to Quatr.us Study Guides!

Commutative Project

Number line
Number line

To get to understand the number line better, mark out a line on the playground or on the sidewalk outside your house with chalk. At the middle of the line, write 0 (zero). Going one way alone the line from zero, write the positive numbers a step apart (1, 2, 3, 4, 5...) and going the other way write the negative numbers (-1, -2, -3, -4, -5). Then one person can call out math problems (addition or subtraction), while the other person acts the problems out by walking along the line. When the actor makes a mistake, you can trade places. Experiment with both positive and negative numbers: try to trick each other.

You can play a different game with raisins or cookies, or with marbles or small rocks. Have four people each sit down with five cookies. Go around the circle taking turns asking another player for a certain number of cookies. Say how many cookies that person has left. Say how many you have now. If you make a mistake, you have to give the person back a cookie.

More about Commutative operations
More about the number line

Bibliography and further reading about addition:

More about Multiplication
More about Fractions
More about Math
Quatr.us home


Please help other teachers and students find us: link to this page from your class page.
Karen Carr is Associate Professor Emerita, Department of History, Portland State University. She holds a doctorate in Classical Art and Archaeology from the University of Michigan. Follow her on Instagram, Pinterest, or Twitter, or buy her book, Vandals to Visigoths.
Karen Carr is Associate Professor Emerita, Department of History, Portland State University. She holds a doctorate in Classical Art and Archaeology from the University of Michigan. Follow her on Instagram or Twitter, or buy her book, Vandals to Visigoths.
Sign up for more free articles and special offers in Quatr.us' weekly newsletter:
We will never share your e-mail address unless you allow us to do so. View our privacy policy. Easy unsubscribe links are provided in every email.
Check out our new ebook: Short and Simple: Ancient Greek Myths! - just out! Twenty-five easy to read, illustrated stories, from Pandora to Medea, Icarus, and the Trojan Horse (you can read these online as samples). Get it this week for just $14.99, five dollars off the regular price of $19.99.
Cite this page
  • Author: K.E. Carr
  • Title:
  • Site Name: Quatr.us Study Guides
  • Publisher: Quatr.us
  • Date Published:
Did you find what you needed? Ask your teacher to link to this page so other people can use it too! Send it in and win a Quatr.us "Great Page!" award!
Sign up for more free articles and special offers in Quatr.us' weekly newsletter:
We will never share your e-mail address unless you allow us to do so. View our privacy policy. Easy unsubscribe links are provided in every email.
Comment on This Article
Quatr.us is loading comments...
(Comments will appear after moderation, if they are kind and helpful. Feel free to ask questions, and we'll try to answer them.)
Cite this page
  • Carr, K.E. . Quatr.us Study Guides, . Web. 18 October, 2017
ADVERTISEMENT