Class Starter 8-19-13

Integers & Absolute Value

With sea level as the starting point of 0, you can express 86 meters below

sea level as 0 – 86, or – 86.

Negative Numbers & Integers

A negative number is a number less than zero.

Negative numbers like –86, positive numbers like +125, and zero are members of the set of integers.

The Set of Integers

Integers can be represented as points on a number line.

This set of integers can be written as {…, -3, -2, -1, 0, 1, 2, 3,…}

where … means it continues to infinity in both directions.

Examples

CoordinatesTo graph integers, locate the point named by the integers on a number line.

The number that corresponds to a point is called the coordinate of that point.

Notice that 5 is to the left of 4 on the number line.

This means that 5 is less than 4.

Inequalities

A sentence that compares two numbers or quantities is called an inequality. They contain symbols like and .

Absolute Value

Expressions with Absolute Values

Assignment – Integers & Absolute Value

Do #4-56 even, Omit #32,48,50