How to calculate a square root without a calculator

How to calculate a square root without a calculator and should your child learn how to do it. ... Math is built on a foundation, and good number sense and mastering basic mental math is needed for further studies. ... Squaring that we get 2.52 = 6.25. That's too high, so make the guess a little less. Let's try 2.4 next. To find approximation to ... ................
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