SOLUTION: Paperback books are on sale for $3.95 each including tax. Explain how you could use the Distributive Property to mentally calculate the total cost of buying 7 paperback books.

Algebra ->  Distributive-associative-commutative-properties -> SOLUTION: Paperback books are on sale for $3.95 each including tax. Explain how you could use the Distributive Property to mentally calculate the total cost of buying 7 paperback books.      Log On


   



Question 160215: Paperback books are on sale for $3.95 each including tax. Explain how you could use the Distributive Property to mentally calculate the total cost of buying 7 paperback books.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
You can see that 3.95 is close to 4.00 or exactly 4.00-0.05.
and that
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7%2A3.95=7%284.00-0.05%29
7%2A3.95=7%2A4.00-7%2A0.05
7%2A3.95=28.00-0.35
7%2A3.95=27.65
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7*$3.95=$27.65, no calculator needed thanks to the distributive property.