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Estimating Square Roots

Estimating Square Roots. Notes and Skills Practice. Perfect Squares. Square roots that work out evenly are called “perfect squares”. What if it’s not a perfect square?. Square roots that do not work out evenly are irrational numbers

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Estimating Square Roots

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  1. Estimating Square Roots Notes and Skills Practice

  2. Perfect Squares • Square roots that work out evenly are called “perfect squares”

  3. What if it’s not a perfect square? • Square roots that do not work out evenly are irrational numbers • Because of this, we can only estimate or round the answer

  4. Steps • Find the two perfect squares that the number is between • Decide if the decimal should be big, small, or in the middle • Multiply until you find the decimal that is closest

  5. Notes – Estimating Square Roots • Perfect Squares – Double check your table! 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 20 25 1 4 9 16 25 36 49 64 81 100 121 144 169 196 225 400 625

  6. Example 8.9 x 8.9 801 +7120 79.21 8 9 8.__ 8.9 8.8 x 8.8 704 +7040 77.44

  7. Practice – Estimating Square Roots 3.7 7.1 6.2 9.5 2.4 12.6 1) 4) 2) 5) 3) 6)

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