Posted by **Tee** on Thursday, March 6, 2008 at 12:12am.

What are the groupable models and the pregrouped/Trading models of base-ten concept?

How are they different?

I have been searching for a defination for these terms but my efforts deem unsuccessful. Could u asset me plzz.

- Base-ten concept -
**bobpursley**, Thursday, March 6, 2008 at 6:18am
In base 10, blocks of one can be combined to make blocks of length ten, then the strings of ten can be grouped to make a block of 100. The individual blocks are groupable, but a block of lenght ten is called pregrouped, and can be traded for ten individual blocks.

These blocks, or some in rod form, were popular in the sixties, and seventies, as manipulatives for number sense, but research has been clear that that they fail to help children understand number structure and number operations, albeit they understood the trading game well.

Groupable: can be combined to make units of 10 or 100

Pregrouped: blocks or rods precombined in length 10

Trading model: A block of length 10 which can be traded for ten individual blocks.

## Answer this Question

## Related Questions

- College Math 213 - write each of the following in the indicated base. 1011two to...
- Math - Write each of the following in the indicated base. (a) 1021three to base ...
- math - Deshawn has five base-ten blocks. She models a number that is less than ...
- MTH 213-Elementary Math - Write each of the following in the indicated base. (a...
- Math - Is anyone familiar with base ten? I need to show my work on how I ...
- Math - Explain how a child who has not yet developed base-ten concepts ...
- Elementary Mathematics - How can a child who has not yet developed base-ten ...
- math - Find the representation of the number 256 in the following bases: a. base...
- math - a rectangular box with a volume of 60 ft^3 fas a square base. Find a ...
- science - Why are models useful? a) models work exactly like the things they ...