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    Estimate the value of 98.5 x 13
    Estimate the value of 102.3 divided by 4.7
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    100 * 13 = 1300

    100 / 5 = 20

    just round up or down and do the calcualtion
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    (Original post by ghroaw2431)
    Estimate the value of 98.5 x 13
    Estimate the value of 102.3 divided by 4.7
    for 98.5 x 13 => (100-1.5)x13= 1300-19.5=1280.5
    for the second one it would be easier to use derivative estimation
    but since u want an estimate, make it 102.5/5=20.5 , while the exact answer is = 21.7659574468

    hope it helps
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    (Original post by ghroaw2431)
    Estimate the value of 98.5 x 13
    Estimate the value of 102.3 divided by 4.7
    If this is GCSE maths, round your numbers to 1 significant figure and then do the very simple calculation.
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Updated: January 17, 2018
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