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OAT Lesson 20: Dealing with Negative Numbers

Last updated over 2 years ago
16 questions
Develop Understanding
Today's Learning Goal: (G7, U6, L9)
  • Generalize (orally) that doing the same thing to each side of an equation generates an equivalent equation.
  • Solve equations of the form px + q = r or p(x +q ) = r that involve negative numbers, and explain (orally and in writing) the solution method.
Today's Materials:
  • Laptop
  • Laptop charger
  • Pen/Pencil/Paper/Expo Marker (optional)
Please complete the Jump Start (activator). You have 5 minutes before we review. This is independent it should be silent.
Reminders:
1. Ready for class
2. No cellphones
3. Volume must be low.
4. Read and follow all directions
5.) Take your bag off and immediately begin the Activator.

JUMP START: Which One Doesn’t Belong: Rational Number Arithmetic

(5min)

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1

Which One Doesn't Belong

Launch: Practice Problem - (10 min)

I do (question
We do (question
You do (question) -9
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0

4x = -28

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0

x - (-6) = -2

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0

-x +4 = -9

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1

-3x + 7 = 1

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1

25x + (-11) = -86

Activity 1: Old and New Ways to Solve

(12 min)

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1

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1

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1

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1

Activity 2: Keeping it True.

(15min)

Here are some equations that all have the same solution.

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1

Explain how you know that each equation has the same solution as the previous equation.

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0

With a partner start with
Do the same thing to each side at least three times to create an equation that has the same solution as the starting equation.
Write the equation you ended up with on a slip of paper, and trade equations with your partner.

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See if you can figure out what steps they used to transform into their equation. When you think you know, check with them to see if you are right.

Lesson Synthesis: - (5 min)

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1

What are some important things to keep in mind when working with negative numbers?

Cool Down: Solve Two More Equations

(5 min)

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4

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4

Closure Questions:

  • What is something important when your solving equations?
  • When your multiply/divide two negatives number your get a _____?
  • 2 - 5 = 3 (True or False)