Arithmetic of Computers

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Lesson 6

The Octal System

From eight to ten

Page 187

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Your answer :

1(8²) + 3(8¹) + 2(8⁰) = 90.

You are correct.

1(8²) + 3(8¹) + 2(8⁰) = 1(64) + 3(8) + 2(1) = 64 + 24 + 2 = 90.

How about:

2(8²) + 1(8¹) + 3(8⁰)?

Answer :

2(8²) + 1(8¹) + 3(8⁰) = 75.

Go to Page 179

2(8²) + 1(8¹) + 3(8⁰) = 160.

Go to Page 184

2(8²) + 1(8¹) + 3(8⁰) = 139.