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

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Arithmetic with integers (Day 1) Add, subtract, multiply, and divide Why do I need this? Integers are used in money, sports, Jeopardy, battle strategies, and give and ... – PowerPoint PPT presentation

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


1
Arithmetic with integers (Day 1)
  • Add, subtract, multiply, and divide

2
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)

3
  • 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.
4
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
5
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.
6
  • 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
7
White boards
8
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.

9
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
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