Vocab
Lesson 8–2
Lesson 8–5
common factor
common multiple
12: 1, 2, 3, 4, 6, 12
4: 4, 8, 12, 16, 20, 24, 28, 32, 36 . . .
6: 6, 12, 18, 24, 30, 36, 42 . . .
30: 1, 2, 3, 5, 6, 10, 15, 30
common multiples of 4 and 6: 12, 24, 36
common factors of 12 and 30: 1, 2, 3, 6
Lesson 8–1
Lesson 8–3
denominator
equivalent fractions
_58 = 5 ÷ 8
8 =_
4
_
7
14
Lesson 8–1
Lesson 8–2
fraction
1
3
greatest common
factor (GCF)
1
3
12: 1, 2, 3, 4, 6, 12
_3
30: 1, 2, 3, 5, 6, 10, 15, 30
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2
greatest common factor: 6
Lesson 8–6
Lesson 8–5
least common
denominator (LCD)
2×2 =_
4
_2 = _
×
6
3
3 2
1×1 =_
1
_1 = _
6
6×1
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least common
multiple (LCM)
4: 4, 8, 12, 16, 20, 24, 28, 32, 36 . . .
6: 6, 12, 18, 24, 30, 36, 42 . . .
6 is the LCD
least common multiple of 4 and 6: 12
6
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Ideas for Use
• Design a crossword puzzle. Use the
definition for each word as the clues.
A whole number that is a multiple of two or
more numbers.
A number that is a factor of two or more
numbers.
Use a thesaurus to write a synonym and an
antonym for common.
When are factors useful?
Fractions that have the same value.
The bottom number in a fraction. It
represents the total number of equal parts.
Give an example of two fractions that are
equivalent.
Write a tip to help you remember which
number is the denominator in a fraction.
The greatest of the common factors of two or
more numbers.
A number that represents equal parts of a
whole or parts of a set.
Find the greatest common factor of 24 and
36. Show your work.
Explain how fractions represent division.
The least multiple, other than 0, common to
sets of multiples.
The least common multiple of the
denominators of two fractions.
How can finding the LCM of two numbers be
helpful in a real-world situation?
Explain why finding the LCD is important in
working with fractions.
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• Develop categories for the words. Sort them
by category. Ask another student to guess
each category.
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Vocab
Lesson 8–5
Lesson 8–1
multiple
7,
1×7
14,
2×7
21,
3×7
28,
4×7
35,
5×7
42,...
6×7
numerator
_58 = 5 ÷ 8
Lesson 8–3
simplest form
=
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8÷ 4 =2
12 ÷ 4 = 3
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Vendor: Quad Graphics
Grade: 5
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Ideas for Use
• Write a tally mark on each card every time
you read the word in this chapter or use it
in your writing. Challenge yourself to use at
least 3 or 4 tally marks for each card.
• Write the names of lessons you would
like to review on the front of each blank
card. Write a few study tips on the back
of each card.
The top number in a fraction. It tells how
many of the equal parts are being used.
A multiple of a number is the product of that
number and any whole number.
The Latin root numer means “number.” Write
two words that contain this root.
Explain why 32 is a multiple of 8. What is
another multiple of 8?
A fraction in which the GCF of the numerator
and the denominator is 1.
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Form is a word that can also be used as a
verb. Write a sentence using it as a verb.
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Grade: 5
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