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Square and Square Roots

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FC: Squares and Square Roots by: Maddie Sefton & Stef Persin

1: Squaring a number means raising that number to a power of two. It means multiplying that number by itself twice.

2: 1^2=1*1=1 2^2=2*2=4 3^2=3*3=9 4^2=4*4=16 5^2=5*5=25 6^2=6*6=36 7^2=7*7=49 | 8^2=8*8=64 9^2=9*9=81 10^2=10*10=100 11^2=11*11=121 12^2=12*12=144 13^2=13*13=169 14^2=14*14=196 15^2=15*15=225

3: All of the numbers in different colors are perfect squares. Perfect squares are the result you get when you square a whole number.

4: Radical Sign- Used to indicate a positive square root.

5: The plus and minus sign before a radical sign is used to indicate that the answer could be positive or negative.

6: To find a square root on a calculator... | 1.) 2nd button 2.) X^2 button 3.) 6 (a number) 4.) Enter button

7: Estimating a square root: To estimate a square root, you should round the number in the radical sign to a square root that you know. | EX: The square root of 78. You should round to 81 because you know 9x9 is 81 and its the closest perfect square to 78.

8: Rational and Irrational Numbers. Rational numbers can be written as a fraction. Irrational numbers are not repeating or terminating decimals. | The square root of 16 equals 4 which equals 4 over 1. | The square root of 2 equals 1.414213562. This cannot be written as a fraction.

9: Greater than less than. find the square root of 34. then decide what the fraction is as a decimal. | Ex: the square root of 34 is 5.830951895. The fraction 5 and 3/8 as a decimal is 5.375 The square root of 34 is bigger.

10: How to put squares and square roots in order. Order from least to greatest. Ex: 4 1/2, the square root of 17, and 4.4. You should turn the fraction into a decimal and find the square root of 17. 4 1/2 is 4.5 and the square root of 17 is 4.1. The order would be the square root of 17, 4.4 and then 4 1/2.

11: x2=64 means find the square root of 64. Ex:: x2=144=12 x2=100=10 x2=25=5

12: 1. a2=49=? 2. 5 1/4 is >/< the square root of 26? 3. the square root of 15- calculate 4. Estimate- the square root of 95 5.Order from least to greatest- the square root of 3.3,12, and 12/3 6. Is pie irrational or rational?

13: Answers: 1. 7 2. > 3. 3.9 4. round to 100- the square root of 100 is 10. 5. 12, 3.3, and 12/3 6. irrational

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