MODULE IN MATHEMATICS 6 Quarter 2 / Week 5/ Day 1

MODULE IN MATHEMATICS 6 Quarter 2 / Week 5/ Day 1

OBJECTIVE: Describes the set of integers and identify real-life situations that make use of it. 

Integers are composed of positive and negative counting numbers and zero. 

{. . . . , -5, -4, - 3, -2, -1, 0, 1, 2, 3, 4, 5, . . . .} 

Before we go to the concept of integers, let us know first the concept of opposites. The concept of opposites is commonly demonstrated in real life.

• Bank deposits and withdrawals

• the rise and fall in temperature

• gain and loss in business

•  increase and decrease in profit

• right and wrong answers,

• the use of positive and negative integers.

Example

• a profit of Php 50.00 +50 / a loss of Php 15.00 -15

• moving 5 steps forward +5 / moving 3 steps backward -3 

• 6 hours overtime +6 / 4 hours undertime -4

•  a deposit of Php 10 000.00 +10 000 / a withdrawal of Php 5 000.00 -5 000

Example

A messenger forgot on what floor in a building he would deliver his package. With no one to ask for directions, he rode the elevator up to the 10th floor. Then, he went down 5 floors and went up again 4 floors. Still, he could not find the right floor. So, he went up again 6 floors, then down again 3 floors and decided to stop for a while. On what floor did the messenger stop?