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# Activity 1: Solve and Read

#### Step 1

Solve the three problems below using mental math. (Click the arrows to reveal each problem.)

As you work, consider how you are thinking about each and what number knowledge you are accessing.

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Problem 1

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10x3=

10x13=

20x13=

30x13=

31x13=

29x13=

22x13=

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id Problem2

Problem 2

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Mentally place the fractions 3/4, 5/8, and 5/4 and 8/5 on a number line.

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Problem 3

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If a + 1/3 = x, is x more than a, less than a, the same as a, or can you not tell?

If a × 1/3 = x, is x more than a, less than a, the same as a, or can you not tell?

#### Step 2

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# Activity 2: Respond

#### Please respond to the following. Post your response to the Discussion Board by clicking the image to the right.

• In reflecting on the article, what are the limitations of the students’ procedural knowledge? Which of the mathematical proficiency strands come into play when solving these problems?

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