Subtraction With Bead Bars: Difference between revisions
From Montessori Album
No edit summary |
|||
Line 23: | Line 23: | ||
# 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. | # 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 11.JPG|270px]] [[File:Sub with bead bars 12.JPG|270px]] | #:[[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 13.JPG|270px]] | #:[[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 14.JPG|270px]] | #:[[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]] | #:[[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]] | #:[[File:Sub with bead bars 17.JPG|270px]] [[File:Sub with bead bars 18.JPG|270px]] | ||
Revision as of 10:53, 5 November 2013
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.