(4) Binary to decimal conversion. Binary to decimal conversion is really

quite easy. To determine the decimal equivalent, simply add up the values of the

places marked by binary one.

Figure 1-15. Adding up the values of the places marked by binary one

will give you the decimal equivalent.

(a) Note that since the third place to the left is occupied by a zero, we

did NOT add in the value of that place **(**22 x 0 = 0). Only places marked by binary 1 are

added in. Let's try another example: binary 1001. This time you do the calculations.