Page 147 - Math Course 1 (Book 1)

Negative Exponents

Use Negative Exponents Algebraic Expressions with

1
Write as an expression using a negative Negative Exponents
32
exponent. Example

A. 1 –2
2 -5 Evaluate r if r = –4.
B. 2 –6 –2 –2
r = (–4) Replace r with –4.
C. 2 –4 1 Def nition of negative

D. 2 –5 (-4) 2 exponent
2
1 Find (–4) .
Answer 16

1
Answer
16

Your Turn!
MO. 4 - L6b

Evaluating Numerical Expressions WEATHER

with Negative Exponents Fog is composed of cloud droplets with a
diameter of 0.00001 meter. Write the decimal
as a fraction and as a power of ten.

1
Let’s Begin A. 10,000 ; 10 -4

B. 1 ; 10 -5
10,000
REAL WORLD EXAMPLE 1 -5
C. ; 10
ATOM 100,000

An atom is an incredibly small unit of matter. The 1 ; 10 -6
1 D. 100,000
smallest atom has a diameter of approxi-
10
mately of a nanometer, or 0.0000000001 meter.
Answer
Write the decimal as a fraction and as a power of
10.
Algebraic Expressions with Negative Exponents
1 Write the –3
0.0000000001= Evaluate d if d = 5.
10,000,000,000 decimal as
a fraction.
A. 125
1 10 1
= 10,000,000,000 = 10 B. 15
10 10 1
C.
125

Answer 10 -10 Def nition of negative D. –125
exponent
Answer

139