Question: Feel free to write out the problems on paper and post a picture. Define Fact Family , and Explain how the term relate to Addition

Feel free to write out the problems on paper and post a picture.

DefineFact Family, and Explain how the term relate to Addition and Subtraction.

2. Name and complete this expression using TWO different models that we discussed in class. Explain which one was most effective and why.

i. 251 - 163

Method 1:

Method 2:

Explain which is most effective.

ii. 23 x 14

Method 1:

Method 2:

Explain which is most effective.

3. Analyze the following computation. Explain what is wrong in this case. What can you do to fix the understanding?

120

x 11

120

+120

240

4. Explain why we should not just teach the standard algorithm for multiplication even though it is usually the fastest way to solve all multiplication problems.

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