Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 1 - Solving Linear Equations - Maintaining Mathematical Proficiency - Page 1: 5

Answer

$-7$

Work Step by Step

Use the rule $a-b=a+(-b)$ by replacing $\color{blue}{-6}$ with $\color{red}{+(-6)}$ to obtain: $-1\color{blue}{-6}=-1\color{red}{+(-6)}$ Since both addends are negative, add their absolute values and copy the negative sign to obtain: $\begin{align*} -1+(-6)&=-(1+6)\\\ &=-7\end{align*}$
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