Using Addition Properties

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Presentation transcript:

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

Well Done!