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# Number Trick #1 Assume the identity of one of your students as you solve this. - PowerPoint PPT Presentation

Number Trick #1 Assume the identity of one of your students as you solve this. Choose a number Add 6 Multiply by 3 Subtract 10 Multiply by 2 Add 50 Divide by 6.

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## PowerPoint Slideshow about 'Number Trick #1 Assume the identity of one of your students as you solve this.' - kyran

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Presentation Transcript
Number Trick #1Assume the identity of one of your students as you solve this.

• Choose a number

• Multiply by 3

• Subtract 10

• Multiply by 2

• Divide by 6

### Purpose of Session Instruction Through Common Strategies

Number Trick #1 Instruction Through Common StrategiesAssume the identity of one of your students as you solve this.

• Choose a number

• Multiply by 3

• Subtract 10

• Multiply by 2

• Divide by 6

Number Trick #2 Instruction Through Common Strategies

• Choose a number

• Multiply by 3

• Subtract 4

• Multiply by 2

• Divide by 6

What makes this trick different from the first trick?

Building & Simplifying Expressions Instruction Through Common Strategies

DirectionsExpression

• Choose a number

• Multiply by 3

• Subtract 10

• Multiply by 2

• Divide by 6

Expansion Instruction Through Common Strategies

Boxes

Building & Simplifying Expressions Instruction Through Common Strategies

DirectionsExpression

• Choose a number

• Multiply by 3

• Subtract 10

• Multiply by 2

• Divide by 6

Building & Simplifying Expressions Instruction Through Common Strategies

DirectionsExpression

• Choose a number

• Multiply by 3

• Subtract 4

• Multiply by 2

• Divide by 6

• Subtract your

starting number

Backtracking Instruction Through Common Strategies

Backtracking Instruction Through Common Strategies

• Three different ways to illustrate backtracking:

• Working up method

• Working down method

• “Cloud” method

3(x + 5) – 14 = 19

Backtracking Instruction Through Common Strategies

-4(x/2 + 9) = -8

Guess – Check – Generalize Instruction Through Common Strategies

Instructional Strategy

Story Problem #1 Instruction Through Common Strategies

• Last summer, Sergio mowed lawns to earn money. He mowed 35 lawns per week and charged \$6 per lawn, for a total of \$210 per week. This summer, Sergio wants to earn an additional \$150 per week. He will raise his price to \$8 per lawn and find more customers. How many additional customers will Sergio need to find to reach his goal?

Guess-Check-Generalize Instruction Through Common Strategies

Equation:

Story Problem #2 Instruction Through Common Strategies

• In 36 years, Anna will be five times as old as she is today. How old is Anna?

Guess-Check-Generalize Instruction Through Common Strategies

Equation:

Story Problem #3 Instruction Through Common Strategies

• Vanessa works 32 hours per week at her job. Her boss offers her a full-time position (40 hours per week) and a \$2.00-per-hour raise. She says, “This is great! Now, I’ll make \$200.00 more per week!” What is Vanessa’s hourly wage before the raise?

Guess-Check-Generalize Instruction Through Common Strategies

Equation:

Wrap-Up Instruction Through Common Strategies

• Summary

• Questions

• Evaluation Form

lavon.goodrich@dmps.k12.ia.us

joseph.spiess@dmps.k12.ia.us

http://dmpshsmath.wikispaces.com

Thanks for all you do for Des Moines students!