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FACT FAMILIES Miss Koch

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Now that we are warmed up, Let’s get started practicing our fact families!

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What is a Fact Family?

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

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87 What would the SUM for this fact family be?

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15 Good Job!!!

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8 7 Now that we found that the sum of 8+7=15, lets find the rest of the Facts in this family! 15

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

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Write the facts that belong in the fact family: 13 67

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Does your fact family look like this? 6 + 7= = = = 6 Good Job!

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What facts belong in this fact family?

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9+5=14 5+9= = =5 Do your answers look like this?

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

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89 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?

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Now that we found out that the sum of 8+9=17, write the facts that are in this fact family On your wipe off board! =

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Alright, Let’s see those math facts! 17-8 = = = =8

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Let’s Try Another One! 79 What do we need to do first?

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Terrific! The sum of 9+7= 16 Let’s See The Facts From this Family! 16 97

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9+7=16 7+9= =7 16-7=9 Do your answers look like this?

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

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Does everybody have the same number sentence?

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Not all fact families that have the same SUM are going to have the same addends!

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Let’s create a fact family! 13 Who can tell me TWO numbers that add up to 13?

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Let’s try another fact family that has a SUM of 13, but has different addends! 13 What are two DIFFERENT Numbers that add up to 13?

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Let’s Create a fact family with a sum of 15! 15

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Let’s try a fact family that has a sum of 18 18

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LET’S PICK A NUMBER or 15, THIS IS GOING TO BE THE SUM IN OUR FACT FAMILY. LET’S MAKE A FACT FAMILY TOGETHER!

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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!

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GREAT JOB AT PRACTICE, NOW, LETS TRY SOME PROBLEMS ON OUR OWN!

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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 22

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64 If we are not given the SUM in a fact family, how do we find it?

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If 2 fact families have the same sum, do they always have to have the same addends?

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No, fact families with the same SUM do not have to have the same addends!

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GREAT JOB!

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