Difference between revisions of "Bead Bars: Addends Greater than Ten"
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=== Materials === | === Materials === | ||
| − | *Ten bars | + | *Ten bars. |
| − | *Colored bead bars | + | *Colored bead bars. |
| − | *Box of signs for operations | + | *Box of signs for operations.<br> |
=== Preparation === | === Preparation === | ||
| Line 15: | Line 15: | ||
=== Presentation === | === Presentation === | ||
| − | #The child is asked to set up a given addition with addends greater than ten. | + | #The child is asked to set up a given addition with addends greater than ten. |
#At first these should be static operations, i.e. 12 + 14 = | #At first these should be static operations, i.e. 12 + 14 = | ||
| − | #Directress says: "When we have an addition like this, we first add the units, then the tens". | + | #Directress says: "When we have an addition like this, we first add the units, then the tens". |
| − | #After practice such as this, we go on to dynamic operations, ex. 18 + 25 = | + | #After practice such as this, we go on to dynamic operations, ex. 18 + 25 = |
| − | #Directress explains to the child: "First we add the units 8 + 5 = 13. We place a three bar here for the units and keep the ten in mind. We then add the tens; 1+2=3 and one ten in my mind makes four tens, put out four ten bars. The sum is 43".<br><br> | + | #Directress explains to the child: "First we add the units 8 + 5 = 13. |
| + | #We place a three bar here for the units and keep the ten in mind. We then add the tens; 1+2=3 and one ten in my mind makes four tens, put out four ten bars. The sum is 43".<br><br> | ||
=== Control Of Error === | === Control Of Error === | ||
| Line 29: | Line 30: | ||
Addition Chart: may be used here if the child doesn't remember a certain combination.<br> | Addition Chart: may be used here if the child doesn't remember a certain combination.<br> | ||
| − | All of these games are more popular than the other memorization exercises because they are short, and the result is obtained quickly and easily. The children may invent others | + | All of these games are more popular than the other memorization exercises because they are short, and the result is obtained quickly and easily. The children may invent others |
=== Purpose === | === Purpose === | ||
| Line 47: | Line 48: | ||
<br> | <br> | ||
| − | [[Category:Mathematics]][[Category:Mathematics_6-9]] | + | [[Category:Mathematics]] [[Category:Mathematics_6-9]] |
Latest revision as of 03:50, 15 October 2009
Contents
Age
6-9.
Materials
- Ten bars.
- Colored bead bars.
- Box of signs for operations.
Preparation
Presentation
- The child is asked to set up a given addition with addends greater than ten.
- At first these should be static operations, i.e. 12 + 14 =
- Directress says: "When we have an addition like this, we first add the units, then the tens".
- After practice such as this, we go on to dynamic operations, ex. 18 + 25 =
- Directress explains to the child: "First we add the units 8 + 5 = 13.
- We place a three bar here for the units and keep the ten in mind. We then add the tens; 1+2=3 and one ten in my mind makes four tens, put out four ten bars. The sum is 43".
Control Of Error
Points Of Interest
Addition Chart: may be used here if the child doesn't remember a certain combination.
All of these games are more popular than the other memorization exercises because they are short, and the result is obtained quickly and easily. The children may invent others
Purpose
- To practice carrying over memorization of addition combinations.
Variation
Links
Handouts/Attachments
