Course 1

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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.
0.03 0.006 0.0009
1 0.07
one and seven hundredths
0.0369
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
14.08
10 4 0.08
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Check It Out Example 1 Write each decimal in
standard form, expanded form, and words. A. 1.12
B. 0.6 0.008 0.0007
1 0.1 0.02
one and twelve hundredths
0.6087
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
11.02
10 1 0.02
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Additional Example 2 Earth Science
Application The star Wolf 359 has an apparent
magnitude of 13.5. Suppose another star has an
apparent magnitude of 13.05. Which star has the
smaller magnitude?
13.50
13.05
0 is less than 5.
13.05 lt 13.50
The star that has an apparent magnitude of 13.05
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
11.3. Maven reported on another star that has a
magnitude of 11.03. Which star has the smaller
magnitude?
11.30
11.03
0 is less than 3.
11.03 lt 11.30
The star that has a magnitude of 11.03 has the
smaller magnitude.
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Additional Example 3 Comparing and Ordering
Decimals Order the decimals from least to
greatest. 16.67, 16.6, 16.07
16.67 16.60
16.60 lt 16.67
16.67 16.07
16.07 lt 16.67
16.60 16.07
16.07 lt 16.60
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Additional Example 3 Continued
Graph the numbers on a number line.
16.67
16.6
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 16.67.
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Check It Out Example 3 Order the decimals from
least to greatest. 12.42, 12.4, 12.02
12.42 12.40
12.40 lt 12.42
12.42 12.02
12.02 lt 12.42
12.40 12.02
12.02 lt 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 12.42.
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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. 1. 8.0342 2. 10 8 0.3 0.006 3.
eight and twelve hundredths
8 0.03 0.004 0.0002 eight and three
hundred forty-two ten thousandths
18.306 eighteen and three hundred six thousandths
8.12 8 0.1 0.02
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Lesson Quiz Part II
4. It takes Pluto 246.7 years to orbit the Sun,
and it takes Neptune 164.8 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 3.0727 in
the expanded form and words? A. 3 0.07 0.002
0.0007 three and seven hundred twenty-seven
thousandths B. 3 0.7 0.072 0.727 three
and seven hundred twenty-seven thousandths C. 3
0.07 0.072 0.0727 three and seven hundred
twenty-seven ten-thousandths D. 3 0.07 0.002
0.0007 three and seven hundred twenty-seven
ten-thousandths
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Lesson Quiz for Student Response Systems
2. Which of the following represents 25 0.9
0.007 in the standard form and words? A. 25.907
twenty-five and nine hundred seven thousandths
B. 25.907 twenty-five and nine hundred seven
hundredths C. 25.97 twenty-five and ninety
seven hundredths D. 25.97 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. 23.06 20 3 0.006
B. 23.06 20 3 0.06 C. 23.006 20 3
0.06 D. 23.006 20 3 0.006
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Lesson Quiz for Student Response Systems
4. The atomic weight of Gallium is 69.723,
Germanium is 72.64, Copper is 63.546 and Zinc is
65.409. 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. 13.08, 13.3, 13.52 B. 13.52,
13.08, 13.3 C. 13.3, 13.08, 13.52 D. 13.3,
13.52, 13.08