Working with calculators

Today we worked with calculators.
We started with the basic steps.
2+2=
then moved into 2+2+ +  +

Here is what we worked on today. We really had to think while taking it one step into deeper thinking....

Then our Math Journal (MJ) page 15 worked on this concept.

Next we talked about the similarities in the Fact family on the board.
Look at how 35    85   +50  can be worked forward and backwards  with + /- s

Math is so amazing.