Fact Families

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Fact Families
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Objective Today we will learn to write
multiplication and division fact families.
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Definitions
Lets Review

• Addend - Any number being added.
• 6 5 11
• Inverse Operation - An opposite operation that
  undoes another.
• 5 4 9 9 - 5 4

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Addition/Subtraction Fact Families are found by

• Starting with a simple addition fact. ( 2 5
  7)
• Changing the addends around.
• (5 2 7)
• Writing the Inverse operations for both.
• (7 - 2 5 7 - 5 2)

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What are the 4 members of the Fact Family of 3
4 7?

• 3 4 7
• 4 3 7
• 7 - 3 4
• 7 - 4 3

6
What are the 4 members of the Fact Family of 8
1 9?

• 8 1 9
• 1 8 9
• 9 - 8 1
• 9 - 1 8

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Definitions
Multiplication

• Factors - The numbers being multiplied.
• 4 x 8 32
• Inverse Operation - An opposite operation that
  undoes another.
• 4 x 8 32 32 / 4 8

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Multiplication/Division Fact Families are found
by

• Starting with a simple multiplication fact. ( 3
  x 9 27)
• Changing the Factors around.
• (9 x 3 27)
• Writing the Inverse operations for both.
• (27 / 3 9 27 / 9 3)

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What are the 4 members of the Fact Family of 3 x
7 21?
model

• 3 x 7 21
• 7 x 3 21
• 21 / 3 7
• 21 / 7 3

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What are the 4 members of the Fact Family of 6 x
4 24?

• 6 x 4 24
• 4 x 6 24
• 24 / 6 4
• 24 / 4 6

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Multiplication/Division Fact Families are found
by

• Starting with a simple multiplication fact. ( 3
  x 9 27)
• Changing the Factors around.
• (9 x 3 27)
• Writing the Inverse operations for both.
• (27 / 3 9 27 / 9 3)

12
What are the 4 members of the Fact Family of 7 x
8 56?
Guided

• 7 x 8 56
• 8 x 7 56
• 56 / 7 8
• 56 / 8 7

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What are the 4 members of the Fact Family of 9 x
7 63?

• 9 x 7 63
• 7 x 9 63
• 63 / 9 7
• 63 / 7 9

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What are the 4 members of the Fact Family of 6 x
7 42?

• 6 x 7 42
• 7 x 6 42
• 42 /6 7
• 42 / 7 6

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Multiplication/Division Fact Families are found
by

• Starting with a simple multiplication fact. ( 3
  x 9 27)
• Changing the Factors around.
• (9 x 3 27)
• Writing the Inverse operations for both.
• (27 / 3 9 27 / 9 3)

CFU
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Closure

• A fact family will have two multiplication
  problems and two division problems.
• Inverse Operation - An opposite operation that
  undoes another.
• 3x412 12/ 4 3

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Independent Practice

• Write a multiplication and division fact family
  for the following
• 1) 5 x6 30 6) 9x8 72
• 2) 8x3 24 7) 4x8 32
• 3) 7x2 14 8) 3x9 27
• 4) 6x8 48 9) 9x 2 18
• 5) 2x4 8 10) 4x 6 24

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Answers

• 1) 5 x6 30 6x530 30/65 30/56
• 2) 8x324 3x824 24/83 24/38
• 3) 7x224 2x714 14/27 14/72
• 4) 6x848 8x648 48/68 48/86
• 5) 2x48 4x28 8/42 8/24

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6) 9x872 8x972 72/98 72/80 7) 4x832
8x432 32/84 32/48 8) 3x927 9x327
27/93 27/39 9) 9x218 2x918 18/92
18/29 10) 4x624 6x424 24/64 24/46