Powers and roots

Page 1

Squaring

squaring a number is that number times by itself

9 squared

9 x 9 = 81

9 squared is 81

Square roots

the square root of a number is the number that when times by itself equals the original number

the square root of 81

9 x 9 = 81

the square root of 81 is 9

Page 2

Estimating powers and roots

when estimating roots youmust split the equation up and simplify it

estimate the square root of 820000

square root of 82 x 10000

square root of 82 x square root of 10000

roughly equals 9.1 x 100 = 910

when estimating powers

estimate 8.2 to the power of 4

8 x 8 x 8 x 8

64 x 64

60 x 70 = 4200