A CPU (Central Processing Unit) is the part of a computer that controls all the actions the computer does. It is a small device that contains billions of tiny electronic components. There are 2.600.000 transistors in a 8-core Intel Core i7 processor (transistor count of microprocessors).

The arithmetic itself is performed in the ALU in the CPU. An ALU is the part of the CPU that performs mathematical functions and logic operations. It does addition and subtraction and moves things around inside the memory of the computer. It can be made to operate when you type exact instructions into a computer. After the ALU executes a math problem, the resulting number is stored in the ACC. The ACC is simply a storage location for data, not an element of the CPU that performs functions.

The arithmetic itself is performed in the ALU in the CPU. An ALU is the part of the CPU that performs mathematical functions and logic operations. It does addition and subtraction and moves things around inside the memory of the computer. It can be made to operate when you type exact instructions into a computer. After the ALU executes a math problem, the resulting number is stored in the ACC. The ACC is simply a storage location for data, not an element of the CPU that performs functions.