Determine the sum or difference in clock 12 arithmetic.
-2 - 9
A) 5
B) 4
C) 0
D) 3

Name: Determine the sum or difference in clock 12 arithmetic. -2 - 9 A) 5 B) 4 C) 0 D) 3
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Question

Quizplus · Accepted Answer

In clock arithmetic (mod 12), subtracting 9 from 2 is equivalent to going 9 hours back from 2. This can be thought of as 2 - 9 = -7. To find the positive equivalent, we add 12 (since we're working in mod 12), resulting in -7 + 12 = 5.

Determine the Sum or Difference in Clock 12 Arithmetic