Monthly Archives: October 2013

Patterning and Algebra – Mobius Strips

Let’s bend our minds and our paper. A mobius strip is a simple object made with a piece of paper and tape. Most of us can take a strip of paper and tape it together to look like a band, but what makes a mobius strip of paper? A mobius strip is a surface with only one side. With a simple twist of the paper an ant could travel around both sides of the entire strip of paper without ever having to cross over an edge.

Try it! If you have a length of paper taped together you have two sides – an inside and an outside. Try making a mobius strip by turning your paper with a quarter turn. If you trace your finger along the edge, you finger shouldn’t have to leave the strip, giving the strip one side. What happens if you twist your paper twice? What result would you get if you twisted your paper 99 times? Give it a try.

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Filed under Algebra, Blog

McDonald’s Manager – How Multiples Work In The Real World

This week our goal is to be comfortable generating Multiples and Factors and identifying Lowest Common Multiples and Greatest Common Factors. Sometimes we get caught up in the numbers and forget that some of the concepts we are learning have real life applications. Over the next few days you will be applying our success criteria to a problem and presenting your findings to the class. Please feel free to add success criteria at the bottom of the post if you find any other strategies that work. Remember our success criteria that we created from last class.

When finding the LCM or GCF, I can…

  • Skip count mentally or use my fingers to find multiples or factors
  • I can use a 12×12 chart to find factors of a product or the multiples of a number
  • I can use a 100’s chart to generate multiples or see where multiples overlap
  • I can use a device, Siri or Google to check that my multiples and factors are correct
  • I can use my favorite multiplication strategy to find factors
  • I can a calculator to find multiples and factors

The Problem

Hakeem, Belinda and Ravneet work part-time at McDonald’s on Upper Wentworth. They like to drive to work together. Hakeem works every second day. Belinda works every third day. Ravneet works every fourth day. Today they worked together. When will they work together again? Could you predict all the times they will work with each other in the next two months? Please find a way to show us when they can car pool. You may use devices and success criteria to come up with a response. You must decide on a way to present your findings to the class.

 

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Filed under Blog, Number Sense