Subtraction With Strip Board: Difference between revisions
From Montessori Album
m (Text replacement - "\[.*meroco.*\] \d*" to "") |
|||
Line 46: | Line 46: | ||
== Material == | == Material == | ||
This material is kind of a mess. Why can't the frame come right to the edges of the chart. Almost every kid who tries this the first time slides those strips of wood up against the frame and gets the answers all off by one.<br> | |||
And surely we can come up with a different system than using all those ridiculous wooden strips to cover up the numbers at the top. This is needlessly complicated. | |||
===Make Your Own=== | |||
*[[Media:Subtraction Fact Slips.pdf | Printable Subtraction Fact Slips]] | *[[Media:Subtraction Fact Slips.pdf | Printable Subtraction Fact Slips]] | ||
Revision as of 20:41, 24 April 2020
Subtraction With Strip Board | |
---|---|
Math - Memory Work | |
Level | Primary |
Age | 5+ |
This activity gives the child practice figuring out and memorizing subtraction facts.
Presentations
Presentation One
- Take the material to a mat or table. Lay out as shown.
- The first page should have just one problem: 18-9=
- The next page should have two problems: 17-9= and 17-8=
- Take the 9 strip and cover up the numbers starting from the end. The last visible number is the answer.
- Then take the 8 strip and cover up the numbers starting from the end. The last visible number is the answer.
- next step
Presentation Two
Points of Interest
Control of Error
Variations and Extensions
Material
This material is kind of a mess. Why can't the frame come right to the edges of the chart. Almost every kid who tries this the first time slides those strips of wood up against the frame and gets the answers all off by one.
And surely we can come up with a different system than using all those ridiculous wooden strips to cover up the numbers at the top. This is needlessly complicated.
Make Your Own
Where to Buy
Thinkamajigs $28.95
Thinkamajigs $116.95 (AMI)
$15.5 (Hundred Board)
Hello Wood $59.00 (variation on the traditional material)
Visit www.kidkenmontessori.com