For the Adders, we learned how to assemble them on a breadboard, and we learned about the different outputs each of them gave. When we assembled the four types of adders onto the breadboard, we used the Logic Gate chips from the previous page in order to make them. We also made hand drawn diagrams of the adders.
The Half Adder was the simplest of the four.
The Full Adder
The Two Bit Adder/Half Adder + Full Adder
The Two Bit Adder/Full Adder + Full Adder was the hardest one to do.
Here's another representation of the Two Bit Adder/Full Adder + Full Adder. Mr. G taught us a diagram very similar to this one since it was easier than drawing out all the gates.