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Tr.Reference 29.ppt

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UgyenTshering51

The document teaches about writing multiplication and division fact families. It defines key terms like factors and inverse operations. It provides examples of writing the four facts that make up a fact family, such as changing the order of factors or operands and finding the inverse operations. Students are guided through writing fact families for multiplication and division problems and provided with the answers.

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Fact Families
Objective Today we will learn to write multiplication and division fact families.
Definitions Addend - Any number being added. 6 + 5 = 11 Inverse Operation - An opposite operation that undoes another. 5 + 4 = 9 9 - 5 = 4 Lets Review
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)
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
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
Definitions Factors - The numbers being multiplied. 4 x 8 = 32 Inverse Operation - An opposite operation that undoes another. 4 x 8 = 32 32 歎 4 = 8 Multiplication
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 歎 3 = 9 & 27 歎 9 = 3)
What are the 4 members of the Fact Family of 3 x 7 = 21? 3 x 7 = 21 7 x 3 = 21 21 歎 3 = 7 21 歎 7 = 3 model
What are the 4 members of the Fact Family of 6 x 4 = 24? 6 x 4 = 24 4 x 6 = 24 24 歎 6 = 4 24 歎 4 = 6
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 歎 3 = 9 & 27 歎 9 = 3)
What are the 4 members of the Fact Family of 7 x 8 = 56? 7 x 8 = 56 8 x 7 = 56 56 歎 7 = 8 56 歎 8 = 7 Guided
What are the 4 members of the Fact Family of 9 x 7 = 63? 9 x 7 = 63 7 x 9 = 63 63 歎 9 = 7 63 歎 7 = 9
What are the 4 members of the Fact Family of 6 x 7 = 42? 6 x 7 = 42 7 x 6 = 42 42 歎 6 = 7 42 歎 7 = 6
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 歎 3 = 9 & 27 歎 9 = 3) CFU
Closure A fact family will have two multiplication problems and two division problems. Inverse Operation - An opposite operation that undoes another. 3x4=12 *** 12 歎 4 = 3
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
Answers 1) 5 x6 = 30 6x5=30 30 歎 6=5 30 歎 5=6 2) 8x3=24 3x8=24 24 歎 8=3 24 歎 3=8 3) 7x2=24 2x7=14 14 歎 2=7 14 歎 7=2 4) 6x8=48 8x6=48 48 歎 6=8 48 歎 8=6 5) 2x4=8 4x2=8 8 歎 4=2 8 歎 2=4
6) 9x8=72 8x9=72 72 歎 9=8 72 歎 8=0 7) 4x8=32 8x4=32 32 歎 8=4 32 歎 4=8 8) 3x9=27 9x3=27 27 歎 9=3 27 歎 3=9 9) 9x2=18 2x9=18 18 歎 9=2 18 歎 2=9 10) 4x6=24 6x4=24 24 歎 6=4 24 歎 4=6

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Tr.Reference 29.ppt

  • 2. Objective Today we will learn to write multiplication and division fact families.
  • 3. Definitions Addend - Any number being added. 6 + 5 = 11 Inverse Operation - An opposite operation that undoes another. 5 + 4 = 9 9 - 5 = 4 Lets Review
  • 4. 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)
  • 5. 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
  • 7. Definitions Factors - The numbers being multiplied. 4 x 8 = 32 Inverse Operation - An opposite operation that undoes another. 4 x 8 = 32 32 歎 4 = 8 Multiplication
  • 8. 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 歎 3 = 9 & 27 歎 9 = 3)
  • 9. What are the 4 members of the Fact Family of 3 x 7 = 21? 3 x 7 = 21 7 x 3 = 21 21 歎 3 = 7 21 歎 7 = 3 model
  • 10. What are the 4 members of the Fact Family of 6 x 4 = 24? 6 x 4 = 24 4 x 6 = 24 24 歎 6 = 4 24 歎 4 = 6
  • 11. 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 歎 3 = 9 & 27 歎 9 = 3)
  • 12. What are the 4 members of the Fact Family of 7 x 8 = 56? 7 x 8 = 56 8 x 7 = 56 56 歎 7 = 8 56 歎 8 = 7 Guided
  • 13. What are the 4 members of the Fact Family of 9 x 7 = 63? 9 x 7 = 63 7 x 9 = 63 63 歎 9 = 7 63 歎 7 = 9
  • 14. What are the 4 members of the Fact Family of 6 x 7 = 42? 6 x 7 = 42 7 x 6 = 42 42 歎 6 = 7 42 歎 7 = 6
  • 15. 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 歎 3 = 9 & 27 歎 9 = 3) CFU
  • 16. Closure A fact family will have two multiplication problems and two division problems. Inverse Operation - An opposite operation that undoes another. 3x4=12 *** 12 歎 4 = 3
  • 17. 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
  • 18. Answers 1) 5 x6 = 30 6x5=30 30 歎 6=5 30 歎 5=6 2) 8x3=24 3x8=24 24 歎 8=3 24 歎 3=8 3) 7x2=24 2x7=14 14 歎 2=7 14 歎 7=2 4) 6x8=48 8x6=48 48 歎 6=8 48 歎 8=6 5) 2x4=8 4x2=8 8 歎 4=2 8 歎 2=4
  • 19. 6) 9x8=72 8x9=72 72 歎 9=8 72 歎 8=0 7) 4x8=32 8x4=32 32 歎 8=4 32 歎 4=8 8) 3x9=27 9x3=27 27 歎 9=3 27 歎 3=9 9) 9x2=18 2x9=18 18 歎 9=2 18 歎 2=9 10) 4x6=24 6x4=24 24 歎 6=4 24 歎 4=6