(a) Mark is in each column where subtraction was possible. (See

arrows, preceding figure.) Mark zeros where subtraction was not possible. For decimal

28, then, there was one 16, one 8, one 4, no 2, and no 1, resulting in binary 11100.

Enter these numbers in the appropriate columns of figure 1-22.

Figure 1-23. Decimal 28 is equivalent to binary 11100.

(b) Now, convert decimal 35. The subtraction of powers of two (binary

place values) has been done for 10.5402 Tm( )Tj12 0 0 12 153.37o

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