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This is a short, powerpoint introduction to perfect squares and square roots.

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- 1. An Introduction
- 2. By definition 25 is the number you would multiply times itself to get 25 for an answer. In other words, what times what would give you a product of 25? Because we are familiar with multiplication, we know that 25 = 5, because 5 x 5 = 25. 5 is the square root of 25. Numbers like 25 and 49, which have whole numbers for their square roots, are called perfect squares. You need to memorize at least the first 15 perfect squares. By definition 49 is the number you would multiply times itself to get 49 for an answer. In other words, what times what would give you a product of 49? Because we are familiar with multiplication, we know that 49 = 7, because 7 x 7 = 49 . 7 is the square root of 49.
- 3. <ul><li>What times itself is the number in the root symbol? </li></ul><ul><li>is 3 because 3 times 3 is 9 </li></ul>
- 5. <ul><li>is 4 because 4 times 4 is 16 . </li></ul>
- 7. Perfect square Square root 1 1 = 1 4 4 = 2 9 9 = 3 16 16 = 4 25 25 = 5 36 36 = 6 49 49 = 7 64 64 = 8 81 81 = 9 100 100 = 10 121 121 = 11 144 144 = 12 169 169 = 13 196 196 = 14 225 225 = 15 Perfect square Square root

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