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Chapter 3: Q5. (page 166)

What is the value of -15+9?

a.-24

b. -6

c.6

d.24

Short Answer

Expert verified

The correct value is option b. -6

Step by step solution

01

Step  1.Apply the concept of subtraction of integer

In this, use the concept of subtraction of integer in such a way that always keep the positive and negative sign in mind when subtracting them.

02

Step 2.Finding the correct value 

Here,

The expression is -15+9.

Now, when adding in the above term it is seen that there is a negative sign in higher value and positive sign in positive value, so here it will subtract and it is known that '-'+'+'='-'

So, the correct value be

=鈭�15+9=鈭�6

The correct Option is B.

03

Step 3. Eliminating the options to get correct one 

a.-24:It is not the correct option because the correct value is-6.

b. -6: It is the correct option because the correct value is -6.

c.6: It is not the correct option because the correct value is -6not6.

d.24: It is not the correct option because the correct value is-6 not 24.

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