In Addition and Subtraction, Classroom Resources, Number and Algebra

Before students can combine or separate collections, it is important that students ‘trust the count’ and have a good understanding of the relationship between numbers. Using Cuisenaire rods requires students to trust the count. Exploring this resource can help students to represent numbers in a variety of ways and prove that their solution is correct.

 

Purpose
  • Use materials to represent different numbers
  • Partition numbers to show different facts, e.g. 2 and 3 makes 5
  • Explain how different numbers can be partitioned
  • Combine collections and identify the total
  • Compare the size of collections and identify the difference
  • Use symbols to represent known facts

 

Curriculum Connections
NSW Syllabus Mathematics K-10 – Stage 1: Addition and Subtraction 1
  • Represent and solve simple addition and subtraction problems using a range of strategies, including counting on, partitioning and rearranging parts (ACMNA015)

 

At the end of this lesson students should be able to answer the following questions
  • What do the different rods represent? How can you prove this?
  • How many different ways can you show the number 5?
  • How can you prove that you are correct?
  • Can you use symbols to record these different representations?
  • Can you combine collections and find the total?
  • Can you compare collections and find the difference?
  • How can you use symbols to represent what you have discovered?

 

For more information, please download the attached lesson plan.

Recommended Posts
Contact Us

We're not around right now. But you can send us an email and we'll get back to you, asap.

Not readable? Change text.