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Good Morning!. Please have the following on your desk Warm-Up Colored pen INB Pencil White board Whiteboard marker Complete warm-up 2-1 Complete vocabulary hand out Set up your interactive notebook for today’s lesson. 2-1 Introduction to Integers.

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Good morning
Good Morning!

  • Please have the following on your desk

    • Warm-Up

    • Colored pen

    • INB

    • Pencil

    • White board

    • Whiteboard marker

  • Complete warm-up 2-1

  • Complete vocabulary hand out

  • Set up your interactive notebook for today’s lesson


2 1 introduction to integers
2-1 Introduction to Integers

Objective: I can compare and order integers and determine absolute value.

Now set up the left side of the page & complete:

Page number:

Lesson title: Introduction to Integers

Learning goal: (write the objective in your own words)

What I know: (Write 1 or 2 sentences explaining what you already know about the lesson)


Good morning

California

Standards

Preparation for NS1.1 Compare and order positive and negative fractions, decimals, and mixed numbers and place them on a number line.


Good morning

Why learn this?

Dr. Sylvia Earle holds the world record for the deepest solo dive to an elevation of -1, 250 feet.

When solving real-world problems, you can describe elevations below sea level.


Good morning


Notes
Notes

  • Positive integers are all the whole numbers greater than zero: 1, 2, 3, 4, 5, ...

  • Negative integers are all the opposites of these whole numbers: -1, -2, -3, -4, -5, … .

  • We do not consider zero to be a positive or negative number. It is neutral.

  • For each positive integer, there is a negative integer, and these integers are called opposites. For example, -3 is the opposite of 3, -21 is the opposite of 21, and 8 is the opposite of -8.

  • If an integer is greater than zero, we say that its signis positive.

  • If an integer is less than zero, we say that its signis negative.


Good morning

The opposite of a number is the same

distance from 0 on a number line as the

original number, but on the other side

of 0. Zero is its own opposite.

–4 and 4 are opposites

–4

4

1 2 3 4 5

–5–4–3–2–1 0

Positive integers

Negative integers

0 is neither positive

nor negative


Good morning

Vocabulary terms


Good morning

HELPFUL HINTS!!! and pair up.”

You can compare and order integers by graphing them on a number line. Integers increase in value as you move to the right along a number line. They decrease in value as you move to the left.


Good morning

–7–6–5–4–3–2–1 0 and pair up.”

1 2 3 4 5 6 7

Additional Example 1: Graphing Integers and Their Opposites on a Number Line

Graph the integer –7 and its opposite on a number line.

7 units 7 units

The opposite of –7 is 7.


Good morning

Remember! and pair up.”

–7–6–5–4–3–2–1 0

1 2 3 4 5 6 7

The symbol < means “is less than,” and the symbol > means “is greater than.”

Additional Example 2A: Ordering Integers Using a Number Line

Compare the integers. Use < or >.

4 –4

4 is farther to the right than –4, so 4 > –4.


Good morning

YOUR TURN! and pair up.” On your white board

Compare. Create a number line.

A. –32 32


Good morning

Additional Example 3: Ordering Integers Using a Number Line and pair up.”

–8 –7–6 –5–4 –3 –2 –1 0

1 2 3 4 5 6 7 8

Use a number line to order the integers from least to greatest.

–3, 6, –5, 2, 0, –8

The numbers in order from least to greatest are –8, –5, –3, 0, 2, and 6.


Good morning

YOUR TURN! and pair up.” On your white board

E. Use a number line to order the integers –2, 3, –4, 5, and –1 from least to greatest.


Good morning

Reading Math and pair up.”

The symbol | | is read as “the absolute value of.” For example, |–3| means "the absolute value of –3."


Good morning

12 units and pair up.”

–12 –11 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2

Finding Absolute Value

Copy this inside your “Absolute Value Foldable”

Use a number line to find the absolute value.

|–12|

–12 is 12 units from 0, so |–12| = 12.


Good morning

9 units and pair up.”

–12 –11 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2

YOUR TURN! On your white board

Use a number line to find the absolute value.

|–9|

–9 is 9 units from 0, so |–9| = 9.


Good morning

YOUR TURN! and pair up.” On your white board

Compare. Use <, >, or =.

B. 26 |–26|

C. What is the absolute the absolute value of │-5│?

D. What is the absolute value of │11│?


Rally coach tb pg72
Rally Coach! TB pg72 and pair up.”

B’s complete:

#33

#37

#42

A’s complete:

#31

#35

#40


Left side time
Left side time! and pair up.”

What I learned: write 1-2 sentences about what you learned.

Proof: What's the Error? At 9 AM the outside temperature was -3˚ F. By noon it was -12˚F. A newscaster said that it was getting warmer outside. Why is this incorrect?

Reflection: Give an example in which a negative number has a greater absolute value than a positive number.


Homework
Homework and pair up.”

  • Homeroom: pg. 72 #18-21; 24; 38-40; 42; 44

  • Switch: pg 72 #32-46 EVENS; 48-49