exponential notation (day 1)
TRANSCRIPT
HOUSEKEEPING
MAP testing this week.
Unit 1 is now open. • New lesson will open each day
• Pacing guide coming soon
EXPONENTIAL NOTATION
GOAL FOR TODAY…….
Goal: Know what it means for a
number to be raised to a power and how to represent the repeated multiplication symbol
Know the reason for some bases to require parentheses
Agenda: What is
exponential notation?
How do you determine the sign of the result?
There’s an easier way!
3 + 3 + 3 + 3 + 3 =
5 x 3 =
Multiplication is an easier way of adding the same number with itself multiple times!
What if you’re multiplying the same number with itself multiple times?
3 • 3 • 3 • 3 • 3 =
Exponents are easier ways of multiplying the same number with itself multiple times!
Exponential Notation
35=243
Base
Exponent
Answer
Exponential Notation
In general, for an number x and any positive integer n
Base
Exponent
Practice Time!
Practice Time!
Practice Time!
Practice Time!
Practice Time!
Notice the use of parentheses in #2,3, and 4
Do you know why?
When should you use parentheses?
In cases where the base is either fractional or negative.
If n is a fixed positive integer, then…..
If n is a fixed positive integer, then…..
Exponential Notation
“ x raised to the nth power”
Take a look at the resources listed in the lesson folder!!
• Videos• Practice Problems
Stop into math help @ 2:00 if you have any questions this afternoon
What now?
WRAP UPIt’s over already : (
Why should we bother with exponential notation? Why not just write out the multiplication?
Exponential notation is used for recording scientific notation of very large or very small quantities. It is indispensable for the clear magnitude of a number.