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I believe you are referring to the technique of estimating a square root by division.

Step one: Find the nearest perfect square. 16 in this case.

step 2: Divide the number (15.625) by 4 (the square root of 16). The result is about 3.906

Step 3: Take the average of 4 and 3.906, which is 3.953. This is an approximation of the square root of 15.625.

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14y ago

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Q: What is the square root of the 15.625 by division method?
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