Chapter 4, Problem 13QC

To determine

To find: Sum of the given expression

Answer to Problem 13QC

  $-1$

Explanation of Solution

Given information:

  $6+\left(-7\right)$

Calculation:

We know product of numbers with same sign is always positive and product of numbers with opposite sign is always negative.

Sum of the given expression can be calculated as shown:

  $\begin{array}{l}6+\left(-7\right)=6-7\mathrm{...}\left[(-)·(+)=(-)\right]\\ \Rightarrow 6+\left(-7\right)=-1\end{array}$