What Is the Primary Reason for Delaying the Use of Nonproportional

question 20

Multiple Choice

What is the primary reason for delaying the use of nonproportional models when introducing place-value concepts?

• A)Models do not physically represent 10 times larger than the one.
• B)Models like abacus are hard to learn how to use.
• C)Models like money provide more conceptual than procedural knowledge.
• D)Models do not engage the students as much as the proportional models.

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Definitions:

Cost Of Machines

The expenses involved in acquiring machinery for business operations, including purchase price, installation, maintenance, and operation costs.

Fixed Cost

Expenses that do not change with changes in the volume of production or sales, such as rent, salaries, and insurance.

Variable Cost

A variable cost changes in direct proportion to the level of production or activity in a business, such as materials and labor.

Marginal Cost

The additional expense incurred from generating one more unit of a product or service.