Addition 1
This is the very beginning of understanding how addition works.
Let's look at two sets:
Let's look at two sets:
set A
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioG0cIQUr4Evipo9rQ4pZ6FCAKLEtJKw-tK8eGG8IowHWGLw1Dbc7mh6XvZGEHC5fBkd2XWnqnN5HhkuX3kZLxzmAYa1I9UHGWd0OktXvDLzzGTDCclV_Ike8ES0WK5Qe_De_4v2wcvHlZ/s320/addition01-01.gif)
Count how many triangles are in Set A... There are 2!
sat B
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhHAKA_9jFcX5gCdRk95zaQRVgNy0nMieez-RoIXC-wayDuQPjTGs2uTBc29Bg903ePk4woY24bvxecDKRwt-Atap85VvWP1nBcBb7sd5u2LHihzlbsJa5WZRuCIpcjmzJleL7syvnslWxv/s320/addition01-02.gif)
Count how manytriangles are in Set B...There are 3!
Now, put the sets together into one big set:
Count how many triangles are in this set...There are 5!
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