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Planner: Compare and Order Decimals

Planner: Compare and Order Decimals. Warm-Up Write each decimal as a fraction: A- 0.6 =____ B- 1.25 =____ C- 0.74 =____ D- .20 =____. Warm-Up Write each decimal as a fraction: A- 0.6 = 6/10, 3/5 B- 1.25 = 125/100, 1 25/100, 1 ¼ C- 0.74 = 74/100, 37/50

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Planner: Compare and Order Decimals

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  1. Planner: Compare and Order Decimals Warm-Up Write each decimal as a fraction: A- 0.6 =____ B- 1.25 =____ C- 0.74 =____ D- .20 =____

  2. Warm-Up • Write each decimal as a fraction: A- 0.6 =6/10, 3/5 B- 1.25 =125/100, 1 25/100, 1 ¼ C- 0.74 =74/100, 37/50 D- .20 =20/100, 2/10, 1/5

  3. Mathematical Goals • Use the decimal place-value system to interpret, compare, and order decimals. • Connect understanding of decimals as fractions to the interpretation of decimals as an extension of the place-value system. • Develop strategies for comparing and ordering decimals.

  4. LAUNCH: GETTING READY! • Which of the numbers in the Getting Ready is the largest? Which is the smallest? • But 0.00002 has more digits than the others. Why isn’t it larger? • Which of these numbers—0.35 or 0.305—is larger? Why? • When you look at two decimals, how can you tell which is larger? • Do these ideas make sense? Consider that while doing the problem.

  5. EXPLORE

  6. EXPLORE

  7. SUMMARIZE • Who is taller, Lana or Maria? • How did you decide to order the numbers? • How did you decide that Fred and Abey went in that order? • Which is involved in more accidents, televisions or toilets? • Tell me how you know there are more table than ladder injuries.

  8. SUMMARIZE • Who is the tallest student? Shortest? Who is in the middle? • Did anyone get a different order? • Describe in words a process for comparing two decimal numbers. • Does anyone have another way? • How do these methods compare? Check for Understanding 1. Order from smallest to largest: 0.21, 0.201, 0.2001, 0.20001. 2. Place a <, =, or > sign between each pair to show their relationship. a. 1.31 _____ 20.31 b. 0.109 _____ 0.19 c. 0.10 _____ 0.01 3. Which is closer to 1? a. 0.89 or 0.9 b. 0.001 or 1.01

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