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Week 5, Day 3 – Wednesday October 10, 2012 Homework #19: “Prime or Composite?” Worksheet and “Exploring Divisibility” Worksheet {Front and Back} *Note:

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Presentation on theme: "Week 5, Day 3 – Wednesday October 10, 2012 Homework #19: “Prime or Composite?” Worksheet and “Exploring Divisibility” Worksheet {Front and Back} *Note:"— Presentation transcript:

1 Week 5, Day 3 – Wednesday October 10, 2012 Homework #19: “Prime or Composite?” Worksheet and “Exploring Divisibility” Worksheet {Front and Back} *Note: Last chance to take online practice test

2 Week 5, Day 3 – Wednesday October 10, 2012 Warm Up Answer: Homework #19: “Prime or Composite?” Worksheet and “Exploring Divisibility” Worksheet {Front and Back}

3 Hands-On Lab: Explore Rational Numbers Vocabulary: - Terminating decimal - Repeating decimal - Rational number Week 5, Day 3 – Wednesday October 10, 2012 California Common Core Standard The Number System 2d: Convert a rational number to a decimal using long division; know that the decimal form of a rational number terminates in 0s or eventually repeats.

4 Activity 1: #1. Find the decimal expansion of each rational number

5 Activity 1: #1. Find decimal expansion of each rational number

6 Activity 1: #2. Write each rational number and its decimal expansion on an index card as shown below.

7 Activity 1: #3. Make Piles TerminatingRepeating Neither

8 Activity 1: #4. Which rational numbers are in each stack? List the rational number in the correct column below. TerminatingRepeatingNeither

9 1. When you use long division to write a decimal expansion, how can you tell that the decimal terminates? How can you tell that the decimal repeats? If the division ends or terminates, because the remainder is zero, then the decimal is a terminating decimal. If the division leads to a repeating block of one or more digits (where all digits are not zeros) after the decimal point, then the decimal is a repeating decimal. Week 5, Day 3 – Wednesday October 10, 2012 Activity 1: Think and Discuss

10 2. What do you notice about your stacks of index cards? Are there any cards in the stack for decimals that neither terminate nor repeat? There are no cards in the stack for decimals that neither terminate nor repeat. 3. What can you say about the decimal expansion of any rational number? The decimal expansion of any rational number either terminates or repeats. Week 5, Day 3 – Wednesday October 10, 2012

11 Rational Number Let’s revisit the original question: What is a rational number? What are examples of numbers that are not rational?


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