Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Estimating Square Roots All numbers are not perfect squares, but they can still be square rooted!! √15 √17 √12 We can estimate to find the square roots of nonperfect square numbers. Think of your list of perfect squares... 4 9 16 25 36 49 64 81 1 √18 12 22 32 42 52 62 72 82 92 1 4 9 16 25 36 49 64 81 √18 Falls between 16 & 25 Always go to the closer of the two perfect squares and choose 3 decimal numbers and square them ie: 4.12 = 4.1 x 4.1 = 16.8 4.22 = 4.2 x 4.2 = 17.64 4.32 = 4.3 x 4.3 = 18.49 Choose the closest number to 18, without going over 18 ∴ √18 ≅ 4.2 ≅ means approximately equal to 1 √8 1 Falls between 4 & 9, but is closer to 9, so the answer is above 2.5 4 9 16 25 36 49 64 81 2.62 = 2.6 x 2.6 = 6.76 2.72 = 2.7 x 2.7 = 7.29 2.82 = 2.8 x 2.8 = 7.84 2.92 = 2.9 x 2.9 = 8.41 Try these... 1. √13 3. √27 5. √42 2. 4. 6. ∴ √8 ≅ 2.8 √24 √83 √91 Book Work...Pages 25 27 #'s 4, 5, 7, 8, 9, 10, 13, 14, 15, 16, 17, 22, 23 Work Sheets 11 & 12 2 3