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24 February, 19:03

Anggarkan nilai bagi 11.4³.

A. 1731

B. 1500

C. 1331

D. 1000

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Answers (1)
  1. 24 February, 19:27
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    option C. 1331.

    Explanation:

    The question asks for an estimate of 11.4³.

    To calculate 11.4³ exactly to must multiply 11.4 * 11.4 * 11.4.

    But to have an estimate, the easiest way is to round 11.4 to 11 and find 11³ = 11 * 11 * 11.

    That is not a difficult operation.

    That is equal to 11² * 11.

    11² is a common square, which you should know that it is 121. Else, you can multiply 11 * 11 easily and obtain 121:

    11 * 11 = (10 + 1) * 11 = 110 + 11 = 121

    Then multiply 11 * 121

    11 * 121 = (10 + 1) * 121 = 10 * 121 + 121 = 1210 + 121 = 1331

    There you have your answer: option C. 1331.
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