1.OA1 Lesson 1

1.OA1 Lesson 1

by Brittany McCary

​I do. You watch.

We do together

​Look at the example below. When you change the order does the sum change?

Poll

Will the sum change when I switch the addends around?

• yes

• no

​Look at this picture. Count the rabbits. Next count the birds. How many are there? How many animals are in hats?

Where did these numbers in the number bond come from?

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​Let's talk about the model.

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​​Look at this picture. Count the rabbits. Next count the birds. How many are there? How many animals are in hats?

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​Let's explain the model.

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​Take out your counting cubes. Place 4 red counters on your desk. Place 5 yellow counters on your desk. Let's write a number bond together.

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​5 + 4 = 9

​Work with a partner

​3 + 6=

​6 + 3 =

Fill in the Blanks

6+3=

3+6=

Multiple Choice

5+1=

1+5=

• 4

• 5

• 6

Multiple Select

Use the commutative property to find the matching number sentences.

• 3 + 7= 10

• 6+5=9

• 7+3 =10

• 8+1=9