Page 16 - Math Course 1 (Book 1)

Whole Numbers And Integers

Mo. 1

Lesson 2
Inequality
Any mathematical sentence containing < or > is
KEY CONCEPTS: called an inequality.
1. Compare and Order Integers.
2. Find the absolute value of an expression. Words : -4 is less than 2 2 is greater than 4
OR
Symbols : -4 < 2 2 > -4

MO. 1 - L2a
The symbol point to the lesser number.
Compare and Order

Integers
Let’s Begin

Vocabulary A-Z
Let us learn some vocabulary
Write Integers for Real-World
Situations

Negative number
A negative number is a number less than Examples
zero.
Write an integer for each situation.
negative integers

A. 32 feet underground -32
B. 8 weeks after birth +8

-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 C. a loss of 6 pounds -6

Integers
Any of the natural numbers (positive or negative) Compare Two Integers
or zero. Use the integers graphed on the number line below
They can be represented as points on a number line. for each question.

Write two inequalities involving 7 and –4

-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 -4 -2 0 2 4 6 8
Integers
Since 7 is to the right of -4, write 7 > -4
Coordinate Answer Since -4 is to the left of 7, write -4 < 7.
The number that corresponds to a point is called the
coordinate of that point.
Replace the with <, >, or = in (–2) (3) to make a
graph of a point with graph of a point with true sentence.
coordinate (-4) coordinate (2)

-4 -2 0 2 4 6 8
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6

Answer -2 is less since it lies to the left of 3.
So write -2 < 3.

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