Accentuate the Negative Integers and Rational Numbers

Investigation2: Adding and Subtracting Rational Numbers Students will demonstrate how to combine numbers with the same sign and different signs

Homework Pg 44 1-11 odd 19-29 odd 30, 48,54,66

Warm-up

2.1 Extending Addition to rational numbers Students will understand different properties when combining numbers. Students will demonstrate an algorithm when solving computations.

Problem 2.1 pg 32 We will discuss as a class How can you determine if an answer will be positive, negative or zero Positive if both numbers are positive and adding if signs are different and positive number is farther from zero Positive minus a negative Negative if both signs are negative and adding if signs are different and negative number is farther from zero Negative minus a positive Zero We discuss more in the next section but when numbers are the same but signs are opposite for addition Subtract same number from original

Warm-up

2.2 Extending Subtraction to Rational Numbers Students will demonstrate understanding of additive properties of numbers. Students will demonstrate understanding of absolute value.

Problem 2.2 page 37 We will discuss as a class Additive inverse same number different sign their sum would be zero Additive identity zero added to a number doesn’t change the number Absolute Value This is really the distance a number is from zero, distance is always positive, symbol | |, means make any number inside positive, if already positive it doesn’t do anything

Warm-up

2.3 The +/- connection Students will learn how to rewrite addition as subtraction dn vice versa

Problem 2.3 pg 40 We will discuss as a class How do we rewrite If adding a negative it is the same as subtracting that number If subtracting a positive it is the same as adding a negative If subtracting a negative it turns to adding a postive

Warm-up

2.4 Fact Families Students will understand how to make equivalent equations and expressions.

Problem 2.4 page 43 We will discuss in class Addition order of numbers doesn’t matter Subtraction does

Quiz