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

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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)

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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