Question

Without using number line, calculate each of the following:

$(-15)+12$

Answer 1

Finding the sum of $(-15)+12$

Here, both numbers are of unlike signs $\left[+\&-\right]$

So, we subtract the absolute values of both the numbers and give the sign of largest absolute value to the result.

i.e., sign of $15$, which is $"-"$

Since absolute value of a number denotes the distance between zero and that number in a number line.

So,

$$\begin{gathered} \left|-15\right|=15 \\ \left|12\right|=12 \end{gathered}$$

So, $15-12=3$

Hence, the answer is $-3$