exponentsexponents objective #1: students will write numbers in exponential form objective #2:...
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ExponentsExponentsExponentsExponents
Objective #1Objective #1: Students will write : Students will write numbers in exponential form numbers in exponential form
Objective #2Objective #2: Students will multiply : Students will multiply and divide numbers in exponential formand divide numbers in exponential form
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Parts of a Power
63
Base: the big number; the number being multiplied
Exponent: the little number; tells how many times to multiply the base
Power: the base and exponent together
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The Laws of Exponents
Law #1: Any base raised to the exponent
of 1 is equal to the base. EX: 21 = 2
Law #2: Any base raised to the exponent of 0 is equal to 1.
.EX: 100 = 1
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The Laws of Exponents
Law #3: A negative base raised to an even exponent is ALWAYS positive.
EX: (-5)2 = 25
Law #4: A negative base raised to an odd exponent is ALWAYS negative.
.EX: (-5)3 = -125
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The Laws of Exponents
Law #5: If a fraction is raised to a power then distribute the exponent to both the top and the bottom.
EX:
Law #6: A base raised to a negative exponent is equal to a fraction.
EX: (5)-3 = 1 = 1 (5)3 125
4 4
4
2 2 16= =
3 3 81
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Practice ProblemsSimplify:
1. 2.
3. 4.
5. 6.
1 25 = 05
2(-6) =3(-2) =
-24 = 0(-8) =
25
36
1
-8
1
116
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Multiplication of Powers
**You can only multiply powers that have the same base. (EX: 23 and 25)
**To multiply powers of the same base, add their exponents.
EX: 23 • 25 = 23+5 = 28
**If a power is raised to another power, multiply the exponents together.
EX: (23)5 = 23•5 = 215
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Division of Powers
**You can only divide powers that have the same base. (EX: )
**To divide powers of the same base, subtract their exponents.
EX:4
4-2 22
3=3 =3
3
4
2
33
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Practice ProblemsSimplify:
7. 8.
9. 10.
11. 12.
2 3(2 ) = 3 23 3 =
087 = 2(4 5) =
2(9b) = 3 4(2a ) =
64 81
1 400
81b2 16a1
2