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News & Blog

September 19, 2002  |  By Northwest Montessori In Mathematics

How many ways can you make a number? (Addition strip board Presentation 3)

stripboard

Recommended Age: 5 years and onwards (can be younger depending on the child’s skills and experiences) 

 

Purpose: To present the entire structure of addition and to help the child memorize the addition combinations 

 

Level of Parent Involvement: Medium, the adult must present this exercise to the child, once the child has been shown they may work independently 

 

Prerequisites 

  • The child must be able to count accurately from 1-10 and onwards 
  • The child must be able to write numbers 
  • The child must be able to match the numeral symbol with its quantity of numbers 1-10 and beyond 
  • The child must have had many experiences doing addition with the golden beads 
  • The child has been presented the first and second presentations of the addition strip board (see activity library) 

 

Materials 

* The addition strip board 

* Blue strips 1 to 9 

* Red strips with partitions 1 to 9 

* Pencil 

* Small pieces of blank paper 

* Control chart 1 

NOTE, if doing this exercise with your child from home you will be using the paper version from your resource pack 

 

Preparation 

  • None 

 

Steps 

  • Invite the child together bringing the materials to the table 
  • On the blank paper write a number for the child, for example 12, then say to the child “I wonder how many ways we can make 12?” 
  • Using the strips make 12 one way, for example 3+9 
  • Invite the child to make all other ways (see image below) 
  • Then say to the child “are there any other ways we can make 12?” child responds “no” 
  • Invite the child to write down all equations on the blank paper 
  • Once the child has written down all equations, the child reads them 
  • Invite the child to check with control chart 1 
  • The child may choose another number to see how many ways they can make it independently 

 

Variations 

  • None 

 

 

Article by Northwest Montessori

Previous StoryDIY baric tablets
Next StoryAddition strip board (Presentation 4, Commutative law) 

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