What do Computers do? And what are Integers and Floating Point?

Timestamps 00:00 Intro 00:50 Periodic Table 09:02Transistors Logic Gates 14:25 AND 17:13 OR 19:14 NOT 21:03 XOR 25:19 NAND gates and Turing Completeness 34:57 Half Adder 38:39 Adder 44:00 Subtraction and Two's Complement Method 52:00 ALU 56:14 FPU 01:05:42 Demonstration floating point numbers are approximate 01:08:33 Noting the speed of operations 01:10:08 In Conclusion

Minecraft NAND gate video https://youtube.com/watch?v=QehrR-1h-F8

Minecraft 8-BIT computer https://youtube.com/watch?v=nMeXK0j-4MQ

IT hare, list of instruction speeds http://ithare.com/infographics-operation-costs-in-cpu-clock-cycles/