What is the result of the expression $(− 1) + (− 2) + 2$ using the number line?

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1

− 1

5

− 5

answer is B.

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Detailed Solution

The given expression is

(− 1) + (− 2) + 2

.
To find out the result of the expression

(− 1) + (− 2) + 2,

we have to mark the number 2 on the number line.
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Take back 2 steps from the number 2 (since -2 is a negative number), we get
Question Image

Take back 1 step from the number 0 (since -1 is a negative number), we get,
Question Image

Thus, we have

(− 1) + (− 2) + 2 = − 1

Therefore the result of the expression

(− 1) + (− 2) + 2

using the number line is -1.
Hence option (2) is correct.

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