Using Addition Properties

1
Using Addition Properties

• You know that you can use addition properties to
  help you add.
• Lets try!

2
What should you do before you add?
3,418 85 452
Line up the digits!
3
What do you do first?
1
3,418 85 452 5
Add the ones!
4
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.
5
Did you need to regroup?
1
3,418 85 452 5
Yes!
6
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.
7
Now you try one on your slate.
1 1 2
23,384 8,593 452
32,429
8
Lets try another one.
1
142.09 7.23
149.32
9
One more?
1 1
3,067 2,693
5,760
10
Well Done!