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Unit 1 Overview

09/29/08. 09/29/08. Unit 1 Overview. Unit 1 Overview. 9R. 9L. Comparing and Ordering Decimals. Lesson 1.2 Page 6-7. 09/29/08. 09/29/08. Lesson 1.2: pg. 7, # 5-16. Lesson 1.2: Comparing & Ordering Decimals (pg. 6-7). Standards:. 10R. 10L. CA Content Standards.

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Unit 1 Overview

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  1. 09/29/08 09/29/08 Unit 1 Overview Unit 1 Overview 9R 9L

  2. Comparing and Ordering Decimals Lesson 1.2 Page 6-7

  3. 09/29/08 09/29/08 Lesson 1.2: pg. 7, # 5-16 Lesson 1.2: Comparing & Ordering Decimals (pg. 6-7) Standards: 10R 10L

  4. CA Content Standards • Number Sense 1.1: We compare and order decimals. • Mathematical Reasoning 1.0: We make decisions about how to approach problems.

  5. 09/29/08 09/29/08 Lesson 1.2: pg. 7, # 5-16 Lesson 1.2: Comparing & Ordering Decimals (pg. 6-7) Standards: Vocabulary: 10R 10L

  6. Review Vocabulary: WHOLE NUMBER • AKA: a counting number. • One of the complete numbers (1, 2, 3, …) or zero. 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

  7. Review Vocabulary: DECIMAL • A symbol (.) used to demonstrate that a number is a fraction or not complete. • The opposite of a whole number. • For example: 1.5, 8.77, 9.201 0.1, 2.34, 5.678, 9.012

  8. 09/29/08 09/29/08 Lesson 1.2: pg. 7, # 5-16 Lesson 1.2: Comparing & Ordering Decimals (pg. 6-7) Standards: Vocabulary: Objective: 10R 10L

  9. Objective: • Compare and order decimals. • Math Link: You have learned how to compare and order whole numbers. Now you will learn how to compare and order decimals.

  10. 09/29/08 09/29/08 Lesson 1.2: pg. 7, # 5-16 Lesson 1.2: Comparing & Ordering Decimals (pg. 6-7) Standards: Vocabulary: Objective: Notes/ Examples: 10R 10L

  11. Which number is greater: 0.357 or 0.359? • Step 1: To compare decimals, start at the left and compare digits in the same place. • Step 2: If corresponding digits are the same, move on to the right. 0.357 0.359 Step 3: Once you find two corresponding digits that are different, the larger one belongs to the greater number. Therefore, 0.357<0.359.

  12. Which decimal is the greatest: 2.53 or 2.49? • Step 1: To compare decimals, start at the left and compare digits in the same place. • Step 2: If corresponding digits are the same, move on to the right. 2.53 2.49 • Step 3: Once you find two corresponding digits that are different, the larger one belongs to the greater number. • 2.53 > 2.49 Example 1.

  13. Which decimal is the greatest: 0.347, 0.349, or 0.336? • Step 1: To compare decimals, start at the left and compare digits in the same place. If corresponding digits are the same, move on to the right. 0.347 0.349 0.336 • Step 2: Once you find two corresponding digits that are different, the larger one belongs to the greater number. • 0.336 < 0.347 < 0.349 Example 2.

  14. Which decimal is the greatest: 1.4357, 1.3475, or 1.4375? • Step 1: To compare decimals, start at the left and compare digits in the same place. If corresponding digits are the same, move on to the right. 1.4357 1.3475 1.4375 • Step 2: Once you find two corresponding digits that are different, the larger one belongs to the greater number. • 1.3475 < 1.4357 < 1.4375 Example 3.

  15. Which decimal is the greatest: 2.71, 2.6, or 2.65? • Step 1: If decimals have different numbers of places, use equivalent decimals in the comparison. 2.71 = 3 places 2.6 = 2 places 2.65 = 3 places 2.6  2.60 (3 places) • Step 2: To compare decimals, start at the left and compare digits in the same place. If corresponding digits are the same, move on to the right. 2.71 2.60 2.65 • Step 3: Once you find two corresponding digits that are different, the larger one belongs to the greater number. • 2.60 < 2.65 < 2.71 Example 4.

  16. 09/29/08 09/29/08 Lesson 1.2: pg. 7, # 5-16 Lesson 1.2: Comparing & Ordering Decimals (pg. 6-7) Standards: Vocabulary: Objective: Notes/ Examples: Moral of the Story: 10R 10L

  17. The Moral of the Story • Comparing decimals is similar to comparing whole numbers. Compare each place of each number digit-by-digit.

  18. Number Lines • http://themathworksheetsite.com/numline.html

  19. 10/02/08 10/02/08 Math Minute # 2 Math Minute # 2 11R 11L

  20. Math Minute # 2 • 3  5 = • Four dollars equal ___ pennies. • 2 + 5 x 2 = • 5 + 8 -3 = • 6/2 =

  21. Math Minute # 2 Continued • 0, 4, 8, 12, ___, ___, ___ • 0 x 5,132 = • 2 32 • The product of four and three is ___. • The sum of five and four is ___.

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