find square roots by divided a 12769 b 6889 c 4.5369 d201.64
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12769 is your answer ok
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by 100 until we get a number less than 100, then its square root multiplied by a power of 10 will be the square root fo the original number.
In our example, we only need to divide 6889 by 100 once to get a number less than 100, viz 68.89.
Hopefully we know the first 10 square numbers, so we can tell:
82=64<68.89<81=92
Hence:
8<√68.89<9
and:
80<√6889<90
In our example, we only need to divide 6889 by 100 once to get a number less than 100, viz 68.89.
Hopefully we know the first 10 square numbers, so we can tell:
82=64<68.89<81=92
Hence:
8<√68.89<9
and:
80<√6889<90
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