#4005. Integers

Mathematics, level: Elementary
Posted Tue Nov 7 17:10:22 PST 2006 by Nina Jason ().
Quesnel Elementry, Quesnel,Canada
Materials Required: overhead or chalkboard
Activity Time: 30-45 min
Concepts Taught: Learning the operations of integers

Integers

Objective:

To get students to understand integers.

Lesson:

Today we are going to learn about integers. Does anyone

have any ideas about what integers are? Those are some

great ideas.Okay. Now, please open up your books to a new page.

Page:
Learning About Integers

Defintion: Integers are whole numbers plus negative numbers.
{...-3,-6,-2,-9...}
Created: To provide answers to subtraction problems:{4-6=-2}

Addition: -both positive~add,sum is positve{3+8=11}
-both negative~add,sum is negative{-3+-8=-11
-signs different~more(how much?)+or more-{3+-5=-2}

Subtraction: -add the opposite
{8- -4=8+ +4=12}

Multiplication
& Division: -if signs are the same.....answer is positive
{3x4=12} {-3x-4=12}
{12/3=4} {12/3=4}
-if signs are different.....answer is negative
{-3x4=-12} {+3x-4=-12}
{12/-3=-4} {-12/3=4}