A student was solving the following problem.  Explain the following in complete sentences. a.) Explain what took place in Step 3, the transition to the next step and in Step 4. b.) State the final answer to this addition problem.  

The Egyptian and the Roman numeration systems had this in common with each other.

There are two conceptual models for addition and subtraction.  What are the two models?

The following is a number expressed using the Roman numeration system.  Write the number in our numeration system.

Express “how many” teddy bears there are in base 7.   (Only type the number. Do not type the base)

The following is a number expressed using the Egyptian numeration system.  Write the number in our numeration system.  

In base 8 there are _____ digits?

The following is a number expressed using the Roman numeration system.  Write the number in our numeration system.

{1, 2, 3, …} refer to the Counting numbers also called the ____________ numbers.

In our base 10 system, we use _____ digits.