Arithmetic of Computers

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Lesson 3

Negative Numbers

Real values of less than nothing

Page 99

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Your answer :

8 − ( − 6) = − 2.

The problem was 8 − ( − 6). You must have changed the signs of both the numbers instead of changing just the sign of the number being subtracted.

Here is how you should have proceeded:

sign changed ↓ 8 − ( − 6) = ( + 8) − ( − 6) = ( + 8) + ( + 6) = ? ↑ add instead of subtract

Now it’s easy, isn’t it? Return to Page 103 and choose another answer.