Arithmetic with integers (Day 1) Add, subtract, multiply

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Arithmetic with integers (Day 1)

• Add, subtract, multiply, and divide

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Why do I need this?

• Integers are used in money, sports, Jeopardy,
  battle strategies, and give and take.
• California State standard
• NS 1.2 Add integers
• AF 1.3 Simplify expressions
• High school exit exam (CAHSEE)

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• Silently, on your paper name 4 opposites

Share your opposites with your group.
What is the math opposites?
Add-subtract, multiply-divide, positive-negative
What would be the opposite of 3? Think dont speak
-3 When you add opposites you will always get 0.
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Adding and subtracting

• When you are adding and/or subtracting integers
  pretend that you have heroes and villains.

Integer all whole numbers and their
opposites Ex , -3. -2.00, -1, 0, 1, 4/2, 3,
Non examples 3.4, 3.987, ½, ¼, etc
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Examples
4 -3 is the same as 4 heroes and 3 villains
after they fight what happens (whenever a villain
and a hero fight each other they both are
eliminated)

• In Heroes and Villains explain what these look
  like
• -4 5
• 3 2
• -4 -5
• 4 5
• -5 2

Turn to your neighbor and see if you have the
same explanations.
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• 4 -3 is the same as 4 heroes and 3 villains
  after they fight what happens (whenever a villain
  and a hero fight each other they both are
  eliminated)

The Heroes win, there will be one Hero left. 4
-3 1

• Do the next problems on your own
• -4 5
• 3 2
• -4 -5
• 7 9
• -3 2

Look at your neighbors paper and compare your
answers
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White boards
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Turn to your neighbor and share your paragraph be
prepared to read them in front of the class

• Write a paragraph about how to solve an integer
  expression using villains and heroes.

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EXIT Ticket(write on a new piece of paper, this
will be turned in at the end of the period)

• Write another way that you think will work to
  with positives and negatives without using heroes
  and villains.

EXIT