math
posted by Elizabeth
Shopping: Tax
Situation: You are purchasing four items and want to calculate the tax. The items
cost $2.50, $8.75, $3.00, and $10.25. The tax rate is 6%. How much is the tax?
Calculation With Distribution
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Calculation Without Distribution
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I think is easier: to distribute. to not distribute.
Why I Think it is Easier
© 2015 Connections Education LLC. All rights reserved. 4
Mental Math
Situation: You exercised 24 hours each month for a year. How many hours did you
exercise by the end of the year? You may be able to do the math mentally thanks
to expanded notation and the Distributive Property.
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Calculation Without Distribution
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I think is easier: to distribute. to not distribute.
Why I Think it is Easier
© 2015 Connections Education LLC. All rights reserved. 5
Multiplying by a Negative Number
Situation: Find the value of this integer expression: 2( 3 4 8 7) −+ − − + +++ .
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I think is easier: to distribute. to not distribute.
Why I Think it is Easier
© 2015 Connections Education LLC. All rights reserved. 6
Multiplying and Adding Fractions
Situation: Find the value of this fraction computation:
123 6
234
+ +
.
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I think is easier: to distribute. to not distribute.
Why I Think it is Easier
© 2015 Connections Education LLC. All rights reserved. 7
Geometry formulas
Situation: Find the perimeter of a rectangular area with a length of 13 inches and
a width of 7 inches.
Calculation With Distribution
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Calculation Without Distribution
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I think is easier: to distribute. to not distribute.
Why I Think it is Easier
© 2015 Connections Education LLC. All rights reserved. 8
Original Example
Give an original example of a situation in which the Distributive Property could be
used.
Situation
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9
I think is easier: to distribute. to not distribute.
Why I Think it is Easier
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