Question

Which is the best estimate of -14 1/9 (-2 9/10)

Answer 1

The answer is:  [D]:  "42" .
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Explanation:  
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Consider the "1/9" to be close to "1/10" ; (that is; "0.1" ; since "0.1 = 1/10" ) .

Note that a "negative value" multiplied by a "negative value" equals a "positive value". 

Round the "14.1" to "14" ; and the "2.9" to "3" ;
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-14.1 * -2.9 ≈  14* 3 = 42 . 
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