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Subtraction With Strip Board

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Subtraction With Strip Board
Math - Memory Work
Sub Strip Board 11.JPG
Level Primary
Age 5+

This activity gives the child practice figuring out and memorizing subtraction facts.

Presentations

Presentation One

  1. Take the material to a mat or table. Lay out as shown.
    Sub Strip Board 1.JPG
  2. The first page should have just one problem: 18-9=
    Take the 9 strip and cover up the numbers starting from the end. The last visible number is the answer.
    Sub Strip Board 2.JPG Sub Strip Board 3.JPG
  3. The next page should have two problems: 17-9= and 17-8=
    Lay the shortest of the plain wooden strips over the number 18 on the board.
    Sub Strip Board 4.JPG
  4. Take the 9 strip and cover up the numbers starting from the end. The last visible number is the answer.
    Sub Strip Board 5.JPG Sub Strip Board 6.JPG
  5. Then take the 8 strip and cover up the numbers starting from the end. The last visible number is the answer.
    Sub Strip Board 7.JPG
  6. next step
    Sub Strip Board 8.JPG
    record the equation and answer

Presentation Two

  1. step one
    Sub Strip Board 9.JPG
  2. next step
    Sub Strip Board 10.JPG
  3. next step
    Sub Strip Board 11.JPG
  4. next step
    Sub Strip Board 12.JPG
  5. next step
    Sub Strip Board 13.JPG

Points of Interest

Control of Error

Variations and Extensions

Material

Where to Buy

Thinkamajigs $28.95
Thinkamajigs $116.95 (AMI)
merocomontessori $15.5 (Hundred Board)
Hello Wood $59.00 (variation on the traditional material) Visit www.kidkenmontessori.com