Get ready before the bell rings! Take out homework and a pencil to prepare for the homework quiz! Check the file folder for your class to pick up graded work Located by the bookshelf, blue crate. Look behind the tab for your class period and take home anything with your name on it.

Chapter 2 - Accentuate the Negative

2.1 Extending Addition to Rational Numbers What techniques do we have to add integers? Chip Board Number Line

Chip Board How can we model this problem using chips?

Number Lines How can we use number lines to solve this problem?

2.1 Extending Addition to Rational Numbers Focus Question: How can you predict whether the result of addition of two numbers will be positive, negative, or zero? Turn to Page 32 in your textbook. Complete Problem 2.1 with your neighbors.

2.1 Reflection How do you solve addition problems in which both signs are the same? How do you solve addition problems in which the signs of the numbers are different? For what types of expressions did you get a negative number?

2.1 Reflection How can you write a sum of two numbers that results in a sum of -5?

2.2 Extending Subtraction to Rational Numbers Vocabulary Additive Inverses The sum of two opposites is zero Additive Identity The sum of any number and zero is the original number

Kim’s Chip Model

Otis’s Chip Model

Number Line The Arroyo Family just passed mile 25 on the highway. They need to get to the exit at mile 80. How many more miles do they have to drive?

Your Turn… Turn to page 37 and complete problem 2.2 with your neighbors.

2.2 Reflection How do you compute subtraction problems in which both signs are the same? How do you compute subtraction problems in which the signs of the numbers are different? How do you know if the difference is positive or negative? When you are subtracting with integers, must you always think of the operation as subtraction?

On your own… Consider the following pairs of expressions. Without computing any of the answers, predict how the expressions within each pair compare to teach other. Will the two answers in each pair be the same or different? If they are different, which will be greater? and and