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ACCUPLACER
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Check Reasonableness, Units, and Magnitude
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ACCUPLACER
AR.06 Check Reasonableness, Units, and Magnitude
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A store sells 18 items at $2.45 each. A student says the total is $441. Which statement best explains whether the answer is reasonable?
A
Reasonable; 245 x 18 = 4,410, so $441 is a good money total.
B
Reasonable; a total for 18 items should always be in the hundreds of dollars.
C
Not reasonable; $2.45 is about $2.50, and 18 x $2.50 is about $45, so $441 is about one decimal place too high.
D
Not reasonable; multiplying dollars by items should give items, not dollars.
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