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  • Perplex

    Approximations & Error (Lesson 1/3)

    Rounding Numbers

    1 / 9

    Discussion

    Martha is at the doctor's office for her annual checkup. The diagram below depicts her standing next to a ruler so the doctor can measure her height. Try moving the bottom leveler to measure the very top of Martha's head.

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    (a)

    Can you find Martha's exact height?

    Solution:

    Martha's exact height appears to be about ​170.6cm.