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28 December, 02:29

Estimate the product 2 2/7 x 8 11/13? A) 27 B) 18 C) 16 D) 24

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  1. 28 December, 03:33
    0
    2 2/7 is close to 2.

    8 11/13 is close to 9.

    2 * 9 = 18, so my estimate is that 2 2/7 * 8 11/13 is approximately 18
  2. 28 December, 05:48
    0
    2/7 is less than 1/2 ⇒ discard

    2 2/7 ≈ 2

    11/13 is more than 1/2 ⇒ add 1 to the whole number

    8 11/13 ≈ 9

    2 2/7 x 8 11/13 ≈ 2 x 9 = 18

    Answer: (B) 18
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