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FACT FAMILIES

FACT FAMILIES. Miss O’Leary. What is a Fact Family?. What does the top number in a fact family represent?. 7. 8. Good Job! The Top Number In a Fact Family Represents the SUM !. What would the SUM for this fact family be?. 8. 7. Good Job!!!. 15.

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FACT FAMILIES

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  1. FACT FAMILIES Miss O’Leary

  2. What is a Fact Family?

  3. What does the top number in a fact family represent? 7 8

  4. Good Job! The Top Number In a Fact Family Represents the SUM!

  5. What would the SUM for this fact family be? 8 7

  6. Good Job!!! 15

  7. Now that we found that the sum of 8 + 7 = 15, lets find the rest of the Facts in this family! Write them on your white boards. 15 8 7

  8. Are these the facts you have in your family? 7+8=15 8+7=15 15-7=8 15-8=7

  9. Write the facts that belong in this fact family: 16 7 9

  10. Does your fact family look like this? 9+ 7= 16 7 + 9 = 16 16 – 9 = 7 Good Job! 16 – 7 = 9

  11. What facts belong in this fact family? 17 9 8

  12. Do your answers look like this? 9 + 8 = 17 8 + 9 = 17 17 – 9 = 8 17 – 8 = 9

  13. Good Job! Now, we are going to try some problems where YOU find the numbers in the fact family!

  14. Before we can find out the facts in this family we need to find the SUM! Who can tell me how we are going to find the sum? 9 9

  15. Now that we found out that the sum of 9+9=18, write the facts that are in this fact family On your wipe off board! 9+ 9 = 18 9 9

  16. Alright, Let’s see those math facts! 9 + 9 = 18 18 - 9 = 9 What was different about this fact family? Why do we only have 2 answers?

  17. Let’s Try Another One! What do we need to do first? 3 16

  18. Terrific! The sum of 16 + 3 = 19 Let’s See The Facts From this Family! 19 3 16

  19. 16 + 3 = 19 3 + 16 = 19 19 – 3 = 16 19 – 16 = 3 Do your answers look like this?

  20. On your wipe off board everybody write me a number sentence that has a sum of 20

  21. Does everybody have the same number sentence?

  22. Number sentences with 22as the sum:

  23. Not all fact families that have the same SUM are going to have the same addends! 4 4 1 2 3 2

  24. Write in the missing addends: 4+6=k m+4=10 10-n=4 10-4=p

  25. Write the missing number in each fact family: 4 + 6 = n n + 4 = 10 10 – n = 4 10 – 4 = n

  26. Write the missing number in each fact family: 2 + n = 9 2 + 7 = n n – 7 = 2 9 – n = 2

  27. GREAT WORK TODAY! GREAT JOB!

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