Welcome to Math Ms. Li Room 504
Warm Up
• Take out last night’s homework and put it on your desk • Inverse Operations worksheet – Work on this independently and silently – I will be calling you up to assign your textbook
• If you finish early:
– Open your math journal – Draw a 13 x 13 table – Write your multiplication times tables 1 2 … 12
1
2
1
2
… 12
Objectives • Define the two parts of the power. • Write the verbal phrase for powers. • Evaluate powers.
Agenda • • • •
Warm Up / Textbook Distribution Lesson on powers Powers practice Start homework
Notetaking • Take out your math journal. • Write the date in the upper right hand corner. • On the top line in the middle, write Powers and Exponents.
Powers • A power has two parts: a base and an exponent. • Base: the number to be multiplied – Can be any number
• Exponent: the number of times a base is repeated as a factor.
Example
4
5
• Base • Exponent
Example
6
3
• Base • Exponent
Algebraic Expression • Base • Exponent
b
n
• b = b x b x b (n times) n
Example
4
5
• Equals 4 x 4 x 4 x 4 x4 • Does NOT equal 4 x 5
Example
6
3
• Equals • Does NOT equal
Example
a
5
• Equals • Does NOT equal
Example
12 x 12 x 12 x 12 4 12 •
Example
3 x 3 x 3 x 3 x 3
Verbal Phrase
4
5
• 4 to the fifth power
Verbal Phrase
6
3
• 6 to the third power
Verbal Phrase
9
2
Applications of Exponents • Area (cm2) = s2 • Volume (cm3) = s3
Applications of Exponents • Area (cm2) squared • Volume (cm3) cubed
Verbal Phrase
8
2
• 8 to the second power • 8 squared
Verbal Phrase
7
3
• 7 to the third power • 7 cubed
Pair Practice • Whispers of Practice
Pair Practice • • • •
Take out the half worksheet Work in pairs Put problems on the board One writer, one explainer