Fact Families

Fact Families

Goal: Make a 10 to ADD

Our Goals Today:

​Add and Subtract within 20

Add and subtract within 20 using strategies such as counting on, counting back, making 10, using fact families and related known facts,

and composing and decomposing numbers with an emphasis on Making-A-Ten.

• Take apart

• Example: Decompose numbers or take ​numbers apart

​Decompose

• Put together

• Example: Compose two numbers or put two numbers together​ to create one number

​Compose

Math Vocabulary

• When you create a 10 out by decomposing the second number to add it to the first number in a math problem

​Make-A-TEN Strategy

• Numbers

• Example: Add the two addends together (2+4)

​Addend

Math Vocabulary

• Read the question.

• What do you see in the picture?

• How can you relate to the picture?

• Partner Talk!​

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​

Question

Fill in the Blanks

How many students did you see inside the bus?

Multiple Choice

How many students were outside of the bus?

• 3

• 5

• 0

• 8

• ​Make-A-Ten

• 10 Frame

• Drawing

• Adding numbers

• ​Number line

​

Partner Talk

How can you show your work when adding?

​

Multiple Select

How can you break up the 5 in

(8+5)

so that one of the number can be added to 8 to make a 10?

• 8 and 0

• 3 and 2

• 2 and 3

• You can't

Explain how this student used the 10-Frame to solve the problem 8+7=?

​

10-Frame

Describe how this student used a number line to add 7+7=?

​

Number Line

Answer the question by decomposing the numbers to create the answer.

​Partner 2

Say, "I have 7 apples and 5 oranges. Using the Make-A-Ten Strategy, how can I find how many fruits I have total?"

​Partner 1

Partner Talk

How would you solve the following problem?​

Multiple Choice

Practice: What number would you add to the 7 in

7+8=?

to compose a 10?

• 5

• 4

• 3

• 2

Multiple Choice

Practice: You should have decomposed 8 into 3 and 5. You then should have added the 3 to the 7, making a 10 in the problem

7+8=?

What do you now add to the 10?

• 5

• 4

• 3

• 2

Fill in the Blanks

Great Job! Now, what is the answer to 7+8=?

Multiple Choice

Are the answers to 9+6 and 10+5 the same?

• Yes

• No

Poll

How do you feel about this lesson?