34×76= 224= 78EXPONENTS AND SQUARE ROOTSAN EXPONENT TELLS YOU HOW M...

4. - ACT EXAM SUCCESS 5 PPT 4. - ACT EXAM SUCCESS 5 PPT
ACT EXAM SUCCESS 5 PPT
4.

3

4

×

7

6

=

2

2

4

=

7

8

E

XPONENTS AND

S

QUARE

R

OOTS

An exponent tells you how many times to the base is used as factor. Any base to the power of zero is one.

Example

14

0

= 15

3

= 5 ×5 ×5 = 1253

4

= 3 ×3 ×3 ×3 = 8111

2

= 11 ×11 = 121Make sure you know how to work with exponents on the calculator that you bring to the test. Most sci-entific calculators have a y

x

or x

y

button that is used to quickly calculate powers.When finding a square root, you are looking for the number that when multiplied by itself gives youthe number under the square root symbol.25= 564= 8169= 13

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A C T M AT H T E S T P R A C T I C E

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Have the perfect squares of numbers from 1 to 13 memorized since they frequently come up in all typesof math problems. The perfect squares (in order) are: