Positive and Negative Numbers

1
Positive and Negative Numbers

• Subject Algebra 1
• Grade Level 9th
• By Bruce Mendizabal
• At Huntington Park H.S

2
Positive and Negative NumbersDay 1 Introduction

• What is a positive number
• Ex I owned 20 marbles
• What is a negative number
• Ex I lost 4 marbles
• What is a number line
• The set of all positive and negative numbers
• Counting on the number line
• Positive numbers to the right of 0
• Negative numbers to the left of 0

3
Positive and Negative NumbersDay 2 Line Jumper

• Review Day 1
• Visit Line Jumper Web Site
• Go to http//www.funbrain.com
• Do examples on adding and subtracting, and locate
  the values on the number line
• Ex 9 -23
• Ex -8 -13

4
Positive and Negative NumbersDay 3 Using a
Calculator

• Calculators will be distributive to students
• Be able to locate the , -, and symbols
• Properly typing in the problem
• Ex type in negative 9 plus positive 5
• Correct order 9 - 5
• Handout for classwork
• Students conclude their own mathematical rules
• When is the answer positive or negative
• When to add or subtract the numbers

5
Positive and Negative NumbersDay 4 On Your Own

• Review of Days 1 thru 3
• Students will add and subtract positive and
  negative numbers
• Without using the number line
• Without the use of a calculator
• If students need reinforcement
• Students will go to http//www.aaa.math.com

6
Positive and Negative NumbersDay 5 Quiz Time

• Review the lesson of the week
• Students will review on their own for a few
  minutes
• The class will take a quiz

7
Positive and Negative NumbersSummary and
Resources

• Summary
• Know difference between and
• Be able to count on the number line
• Be able to use a calculator properly
• Do problems on your own
• Resources
• http//www.funbrain.com
• http//www.aaamath.com