# Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.3 - Integers: Addition and Subtraction - Problem Set 1.3: 128

(a) Eight plus negative ten equals negative two. (b) Negative seven minus four equals negative seven plus negative four, which equals negative eleven. (c) Nine minus negative twelve equals nine plus twelve, which equals twenty-one. (d) Negative five plus negative six equals negative eleven.

#### Work Step by Step

If there is a negative sign before a number $x$, it can be put into words as "negative $x$". If there is an addition or subtraction operator between two numbers $x$ and $y$, it can be put into words as "$x$ plus $y$" or "$x$ minus $y$," respectively. An "$=$" symbol can be put into words as "equals".

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