Arithmetic of Computers

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Lesson 8

Octal Arithmetic

The sum gets a bonus

Page 274

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Your answer :

.256₈ = .339…₁₀

You are correct. Since we are working in the octal system, that two-digit number we got was 11₈, which is equivalent to 9₁₀. What we have so far is

.256₈ × 12₈ .534₈ 2.56₈ 3.314₈ × 12₈ .630₈ 3.14₈ 3.770₈ × 12₈ 1.760₈ 7.70₈ 11.660₈

Now, carry the multiplication one step further so you know which way to round .339…₁₀

Answer :

.256₈ = .339₁₀(rounded).

Go to Page 279

.256₈ = .340₁₀(rounded).

Go to Page 284

Answer to Self-Test Question 6, Lesson 8 :

Convert it to 9₁₀.