Subtraction With Bead Bars: Difference between revisions
From Montessori Album
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| Topic = Math | | Topic = Math | ||
| Subtopic = Memory Work | | Subtopic = Memory Work | ||
| | | image = [[File:Sub with bead bars 11.JPG|320px]] | ||
| Level = [[Primary]] | | Level = [[Primary]] | ||
| Age = 4 - 5 | | Age = 4 - 5 | ||
| Preqs = | | Preqs = | ||
| Materials = | | Materials = two bead stairs (1-10 and 1-9) <br> pointer for counting <br> subtraction problem slips <br> paper <br> pencil <br> table-mat (if at table) | ||
}} | }} | ||
This activity | This activity allows the child to figure out subtraction facts. | ||
== Presentations == | == Presentations == | ||
# | # Take the material to a mat or table. (If at a table, you will need a table-mat.) | ||
#:[[File:Sub with bead bars 1.JPG| | #:[[File:Sub with bead bars 1.JPG|270px]] | ||
# | # Draw a problem slip and copy it to the paper. | ||
#:[[File:Sub with bead bars 2.JPG| | #:[[File:Sub with bead bars 2.JPG|270px]] | ||
# | # Take the bead bar for the first number in the problem (the minuend) from the first bead stair. | ||
#:[[File:Sub with bead bars 3.JPG| | #:[[File:Sub with bead bars 3.JPG|270px]] | ||
# | # Count off with the pointer the second number in the problem (the subtrahend) starting from the right. | ||
#:[[File:Sub with bead bars 4.JPG|230px]] | #:[[File:Sub with bead bars 4.JPG|230px]] [[File:Sub with bead bars 5.JPG|230px]] [[File:Sub with bead bars 6.JPG|230px]] [[File:Sub with bead bars 7.JPG|230px]] | ||
# | # Leave the counter in place and point with a finger to count the remaining beads. | ||
#:[[File:Sub with bead bars | #:[[File:Sub with bead bars 8.JPG|270px]] [[File:Sub with bead bars 9.JPG|270px]] | ||
# | # Take a bead bar from the second bead stair that matches up with the number of remaining beads. This is the answer. Write the answer on the paper. | ||
#:[[File:Sub with bead bars | #:[[File:Sub with bead bars 11.JPG|270px]] [[File:Sub with bead bars 12.JPG|270px]] | ||
# | # For problems in which the first number is greater than ten start by writing the problem on the paper. | ||
#:[[File:Sub with bead bars | #:[[File:Sub with bead bars 13.JPG|270px]] | ||
# | # Then lay out the first number as a combination of a ten bar and the appropriate smaller bead bar. | ||
#:[[File:Sub with bead bars | #:[[File:Sub with bead bars 14.JPG|270px]] | ||
# Count from the right as before, then leave the counter in place and count the remaining beads with your finger. | |||
#:[[File:Sub with bead bars 15.JPG|270px]] [[File:Sub with bead bars 16.JPG|270px]] | |||
# Find the bead bar for the answer from the second bead stair. Record the answer on the paper. | |||
#:[[File:Sub with bead bars 17.JPG|270px]] [[File:Sub with bead bars 18.JPG|270px]] | |||
== Points of Interest == | == Points of Interest == | ||
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== Material == | == Material == | ||
*[[Media:Subtraction Fact Slips.pdf | Printable Subtraction Fact Slips]] | *[[Media:Subtraction Fact Slips.pdf | Printable Subtraction Fact Slips]] | ||
==Further Reading== | |||
*[[Teaching Montessori in the Home: The School Years]] by Elizabeth G. Hainstock, page 19, 69-70 | |||
{{#seo: | |||
|keywords=Montessori Album,lesson,activity,math,memory work,Subtraction With Bead Bars | |||
|description=This activity allows the child to figure out subtraction facts. | |||
|published_time={{REVISIONYEAR}}-{{REVISIONMONTH}}-{{REVISIONDAY2}} | |||
}} |
Latest revision as of 20:21, 13 June 2020
Subtraction With Bead Bars | |
---|---|
Math - Memory Work | |
Level | Primary |
Age | 4 - 5 |
Materials | two bead stairs (1-10 and 1-9) pointer for counting subtraction problem slips paper pencil table-mat (if at table) |
This activity allows the child to figure out subtraction facts.
Presentations
- Take the material to a mat or table. (If at a table, you will need a table-mat.)
- Draw a problem slip and copy it to the paper.
- Take the bead bar for the first number in the problem (the minuend) from the first bead stair.
- Count off with the pointer the second number in the problem (the subtrahend) starting from the right.
- Leave the counter in place and point with a finger to count the remaining beads.
- Take a bead bar from the second bead stair that matches up with the number of remaining beads. This is the answer. Write the answer on the paper.
- For problems in which the first number is greater than ten start by writing the problem on the paper.
- Then lay out the first number as a combination of a ten bar and the appropriate smaller bead bar.
- Count from the right as before, then leave the counter in place and count the remaining beads with your finger.
- Find the bead bar for the answer from the second bead stair. Record the answer on the paper.
Points of Interest
Control of Error
Variations and Extensions
Material
Further Reading
- Teaching Montessori in the Home: The School Years by Elizabeth G. Hainstock, page 19, 69-70