The main difference between mental computation and estimation or rounding is:
A)mental computation is done before estimation or rounding is applied.
B)mental computation is easier to understand than estimation or rounding.
C)mental computation gives exact answers while estimation or rounding only gives approximate answers.
D)mental computation is preferred by teachers over estimation or rounding because it is easier to grade since there is only one right answer.

Question

Quizplus · Accepted Answer

Mental computation involves performing calculations entirely in one's head, while estimation or rounding involves approximating numbers to make mental calculations easier. While mental computation can be faster and more efficient, it may not always result in an exact answer. Estimation or rounding can be useful when an exact answer is not necessary, but mental computation should be used when precision is required. Therefore, mental computation gives exact answers while estimation or rounding only gives approximate answers.

The Main Difference Between Mental Computation and Estimation or Rounding