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FACT FAMILIES Miss Koch
Let’s Try to Get 10 ProblemsFirst, we are going to practice Some of our addition facts!! Let’s Try to Get 10 Problems Correct!!!
Now that we are warmed up, Let’s get started practicing our fact families!
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
Now that we found that the sum of 8+7=15, lets find the rest of theFacts in this family! 15 8 7
Are these the facts you have in your family?7+8=15 8+7=15 15-7=8 15-8=7
Write the facts that belong in the fact family:13 6 7
Does your fact family look like this?6 + 7= 13 7 + 6 = 13 13-6= 7 Good Job! 13-7= 6
What facts belong in this fact family?14 5 9
Do your answers look like this?5+9=14 9+5=14 14-5= 9 14-9=5
Good Job! Now, we are going to try some problems where YOU find the numbers in the fact family!
Who can tell me how we are going to find the sum?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? 8 9
Now that we found out that the sum of 8+9=17, write the facts that are in this fact familyOn your wipe off board! 8 + 9 = 17 9 8
Alright, Let’s see those math facts!8+9= 17 9+8 = 17 17-8 = 9 17-9 =8
Let’s Try Another One! What do we need to do first? 7 9
Terrific! The sum of 9+7= 16 Let’s See The Facts From this Family! 16 9 7
9+7=16 7+9=16 16-9=7 16-7=9 Do your answers look like this?
On your wipe off board everybody write me a number sentence that has a sum of
Does everybody have the same number sentence?
Number sentences with 13 as the sum:
Not all fact families that have the same SUM are going to have the same addends!4 4 2 2 3 1
13 Let’s create a fact family!Who can tell me TWO numbers that add up to 13? 13
Let’s try another fact family that has a SUM of 13, but has different addends!What are two DIFFERENT Numbers that add up to 13? 13
Let’s Create a fact family with a sum of 15!
Let’s try a fact family that has a sum of 18
LET’S PICK A NUMBER 13 14 or 15, THIS IS GOING TO BE THE SUM IN OUR FACT FAMILY.LET’S MAKE A FACT FAMILY TOGETHER!
LET’S MAKE A FACT FAMILY TOGETHER!LET’S PICK A NUMBER or 18 , THIS IS GOING TO BE THE SUM IN OUR FACT FAMILY. LET’S MAKE A FACT FAMILY TOGETHER!
GREAT JOB AT PRACTICE, NOW, LETS TRY SOME PROBLEMS ON OUR OWN!
4 2 2 Great Job Today, Let’s Have A Quick Review!What does the number in the top of the triangle of a fact family represent? 4 2 2
If we are not given the SUM in a fact family, how do we find it?6 4
If 2 fact families have the same sum, do they always have to have the same addends?
No, fact families with the same SUM do not have to have the same addends!4 4 2 2 3 1
GREAT WORK TODAY! GREAT JOB!
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