Using addition properties
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Using Addition Properties. You know that you can use addition properties to help you add. Let’s try!. What should you do before you add?. 3,418 + 85 + 452. Line up the digits!. What do you do first?. 1. 3,418 85 + 452 5. Add the ones!.

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Using addition properties

Using Addition Properties

You know that you can use addition properties to help you add.

Let’s try!


What should you do before you add?

3,418 + 85 + 452

Line up the digits!


What do you do first?

1

3,418

85

+ 452

5

Add the ones!


Did you use the associative property when adding the ones?

1

3,418

85

+ 452

5

10

+ 5 = 15

Look for a ten; add 8 + 2, then add the 5.


Did you need to regroup?

1

3,418

85

452

5

Yes!


What are the next steps to finding the sum?

1

1

3,418

85

452

3,955

Add the tens;

regroup;

add the hundreds,

add the thousands.


Now you try one on your slate.

1 1 2

23,384

8,593

+ 452

32,429


Let’s try another one.

1

$142.09

+ 7.23

$149.32


One more?

1 1

3,067

+ 2,693

5,760



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