Difference between revisions of "Bead Bars Multiplication: By Ten"
From wikisori
(New page: === Age === <br> === Materials === <br> === Preparation === <br> === Presentation === <br> === Control Of Error === <br> === Points Of Interest === <br> === Purpose...) |
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Line 1: | Line 1: | ||
=== Age === | === Age === | ||
− | <br> | + | 6-9.<br> |
=== Materials === | === Materials === | ||
− | <br> | + | *Box of colored bead bars 1-10 |
+ | *Chart I | ||
+ | *Small white strips of pape | ||
+ | *Black pen<br> | ||
=== Preparation === | === Preparation === | ||
− | <br> | + | <br> |
=== Presentation === | === Presentation === | ||
− | <br> | + | #The child is invited to take 10 bars of any color he wants. |
+ | #Lay them in a column, skip counting as you go. | ||
+ | #When he is finished and has found the total, lay out the corresponding number of 10 bars vertically in a row beneath the column (note the resulting rectangles should be congruent). | ||
+ | #The number we took was 4 (place a label for 4 beneath the row of beads), 10 times. The result was 40. | ||
+ | #Directress asks the child; "How do we write 40? The 4 will now indicate tens, and we put a zero for the units". Place a 0 label next to the 4 to make 40. | ||
+ | #Repeat this with other numbers until the child realizes by himself that when you multiply a number by 10, the product will be the multiplicand with a zero tacked on in the units place.<br> | ||
=== Control Of Error === | === Control Of Error === | ||
− | <br> | + | <br> |
=== Points Of Interest === | === Points Of Interest === | ||
− | <br> | + | <br> |
=== Purpose === | === Purpose === | ||
− | <br> | + | *To help the child with the memorization of multiplication. |
+ | *To help the child with the independent realization of the fact stated previously: n x 10 = n0.<br> | ||
=== Variation === | === Variation === | ||
− | <br> | + | <br> |
=== Links === | === Links === | ||
− | <br> | + | <br> |
=== Handouts/Attachments === | === Handouts/Attachments === | ||
− | <br> | + | <br> |
[[Category:Mathematics]] | [[Category:Mathematics]] |
Revision as of 04:27, 26 June 2009
Contents
Age
6-9.
Materials
- Box of colored bead bars 1-10
- Chart I
- Small white strips of pape
- Black pen
Preparation
Presentation
- The child is invited to take 10 bars of any color he wants.
- Lay them in a column, skip counting as you go.
- When he is finished and has found the total, lay out the corresponding number of 10 bars vertically in a row beneath the column (note the resulting rectangles should be congruent).
- The number we took was 4 (place a label for 4 beneath the row of beads), 10 times. The result was 40.
- Directress asks the child; "How do we write 40? The 4 will now indicate tens, and we put a zero for the units". Place a 0 label next to the 4 to make 40.
- Repeat this with other numbers until the child realizes by himself that when you multiply a number by 10, the product will be the multiplicand with a zero tacked on in the units place.
Control Of Error
Points Of Interest
Purpose
- To help the child with the memorization of multiplication.
- To help the child with the independent realization of the fact stated previously: n x 10 = n0.
Variation
Links
Handouts/Attachments