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Warm Up Problem of the Day Lesson Presentation Lesson Quizzes Course 1

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Warm Up Order the numbers from least to greatest. 1. 242, 156, 224, 165 2. 941, 148, 914, 814, 721 3. 345, 376, 354, 397 156, 165, 224, 242 148, 721, 814, 914, 941 345, 354, 376, 397

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Problem of the Day Lupe is taller than Reba and shorter than Miguel. Tory is shorter than Lupe but taller than Reba. List the four brothers and sisters in order from tallest to shortest. Miguel, Lupe, Tory, Reba

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**Learn to write, compare, and order decimals using place value and number lines.**

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**Place value can help you understand and write and compare decimal numbers.**

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**Additional Example 1: Reading and Writing Decimals**

Write each decimal in standard form, expanded form, and words. A. 1.07 B Expanded form: Word form: one and seven hundredths Standard form: 0.0369 Word form: three hundred sixty-nine ten-thousandths

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**Additional Example 1: Reading and Writing Decimals**

Write the decimal in standard form and expanded form. C. fourteen and eight hundredths Standard form: 14.08 Expanded form:

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Check It Out: Example 1 Write each decimal in standard form, expanded form, and words. A. 1.12 B Expanded form: Word form: one and twelve hundredths Standard form: 0.6087 Word form: six thousand eighty-seven ten-thousandths

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Check It Out: Example 1 Write each decimal in standard form and expanded form. C. eleven and two hundredths Standard form: 11.02 Expanded form:

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**Additional Example 2: Earth Science Application**

The star Wolf 359 has an apparent magnitude of Suppose another star has an apparent magnitude of Which star has the smaller magnitude? Line up the decimal points. Start from the left and compare the digits. 13.50 Look for the first place where the digits are different. 13.05 0 is less than 5. 13.05 < 13.50 The star that has an apparent magnitude of has the smaller magnitude.

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Check It Out: Example 2 Tina reported on a star for her science project that has a magnitude of Maven reported on another star that has a magnitude of Which star has the smaller magnitude? Line up the decimal points. Start from the left and compare the digits. 11.30 Look for the first place where the digits are different. 11.03 0 is less than 3. 11.03 < 11.30 The star that has a magnitude of has the smaller magnitude.

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**Order the decimals from least to greatest.**

Additional Example 3: Comparing and Ordering Decimals Order the decimals from least to greatest. 16.67, 16.6, 16.07 Compare two of the numbers at a time. Write 16.6 as “16.60.” 16.67 16.60 16.60 < 16.67 16.67 16.07 Start at the left and compare the digits. 16.07 < 16.67 16.60 16.07 Look for the first place where the digits are different. 16.07 < 16.60

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**Additional Example 3 Continued**

Graph the numbers on a number line. 16.6 16.67 16.07 The numbers are ordered when you read the number line from left to right. The numbers in order from least to greatest are 16.07, 16.6, and

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**Order the decimals from least to greatest.**

Check It Out: Example 3 Order the decimals from least to greatest. 12.42, 12.4, 12.02 Compare two of the numbers at a time. Write 12.4 as “12.40.” 12.42 12.40 12.40 < 12.42 12.42 12.02 Start at the left and compare the digits. 12.02 < 12.42 12.40 12.02 Look for the first place where the digits are different. 12.02 < 12.40

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**Check It Out: Example 3 Continued**

Graph the numbers on a number line. 12.42 12.4 12.02 The numbers are ordered when you read the number line from left to right. The numbers in order from least to greatest are 12.02, 12.4, and

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Lesson Quizzes Standard Lesson Quiz Lesson Quiz for Student Response Systems

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Lesson Quiz: Part I Write each in standard form, expanded form and words. 3. eight and twelve hundredths ; eight and three hundred forty-two ten thousandths 18.306; eighteen and three hundred six thousandths 8.12;

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Lesson Quiz: Part II 4. It takes Pluto years to orbit the Sun, and it takes Neptune years. Which takes longer to orbit the Sun? 5. Order the decimals from least to greatest: 16.35, 16.3, 16.5. Pluto 16.3, 16.35, 16.5

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**Lesson Quiz for Student Response Systems**

1. Which of the following represents in the expanded form and words? A ; three and seven hundred twenty-seven thousandths B ; three and seven hundred twenty-seven thousandths C ; three and seven hundred twenty-seven ten-thousandths D ; three and seven hundred twenty-seven ten-thousandths

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**Lesson Quiz for Student Response Systems**

2. Which of the following represents in the standard form and words? A ; twenty-five and nine hundred seven thousandths B ; twenty-five and nine hundred seven hundredths C ; twenty-five and ninety seven hundredths D ; twenty-five and nine hundred seven thousandths

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**Lesson Quiz for Student Response Systems**

3. Which of the following represents ‘twenty-three and six hundredths’ in the standard form and expanded form? A ; B ; C ; D ;

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**Lesson Quiz for Student Response Systems**

4. The atomic weight of Gallium is , Germanium is 72.64, Copper is and Zinc is Which element has the highest atomic weight? A. Gallium B. Germanium C. Copper D. Zinc

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**Lesson Quiz for Student Response Systems**

5. Which of the following represents the given decimals ordered from least to greatest? 13.52, 13.3, 13.08 A , 13.3, 13.52 B , 13.08, 13.3 C. 13.3, 13.08, 13.52 D. 13.3, 13.52, 13.08

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3-1 Representing, Comparing, and Ordering Decimals Warm Up

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