Mental Math for Addition
Presentation
•
Mathematics
•
3rd Grade
•
Easy
Jennifer Irish
Used 3+ times
FREE Resource
5 Slides • 1 Question
1
Mental Math for Addition
2
There is not just one way to get the answer to a math problem. I will be your compass, but I will not be your map.
3
You can find the answer in a variety of ways when adding.
You can write it all out.
34 + 28=
I would write the problem vertical instead of horizontal to make it easier.
4
You can add the tens, add the ones, and then put them together.
34 + 28 =
30 + 20 = 50
4 + 8 = 12
50 + 12 = 62
5
You can make a friendly number.
34 + 28 =
Take 2 away from the 34 and you get 32.
Add those 2 to the 28 and you get 30.
Add 32 + 30 = 62
6
Poll
Which way to you like?
Write it out?
Adding Tens
Making a Friendly Number
Mental Math for Addition
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