Justin's Square Root Scribe Post

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For each number of the following, use perfect squares to estimate the square root to one decimal place.Check your answers with a calculator

a) ✔18 b) ✔23 c) ✔35


You can estimate using perfect squares to find the square root to one decimal place like this:

✔18 is in between the perfect numbers 16 and 25. ✔16=4x4 ✔18=4.__ ✔25=5x5
✔18=4.__ because if you multiply 4.__ it equals 18.

✔23 is in between the perfect numbers 16 and 25. ✔16=4x4 ✔23=4.__ ✔25=5x5
23=4.__ because if you multiply 4.__ it equals 23.

✔35 is in between the perfect numbers 25 and 36. ✔25=5x5 ✔35=5.__ ✔36=6x6
35=5.__ because if you multiply 5.__ it equals 35.