Figure 1-17. Binary and decimal equivalents.

(b) You were right if you did as follows: 1001 = 23 + 2 = (2x2x2) (1) =

8 + 1 = 9. Again, we did not add in the values of the middle places, because they are

occupied by zeros.(Correct your calculations if they were wrong and then proceed.) Up

to now, we have been providing you with the place values, at the top of the box. You

will be expected to have these in your head for the exam. Can you calculate them

yourself? It's simply a matter of entering increasing powers of 2: 2, 21, 22, 23, and so

forth, for the binary system (or increasing powers of 10 for the decimal). Enter the

binary place values in figure 1-18 above the word "place." (Try not to refer back to the

previous figures.)

MD0058

1-14

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