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Objective

Use powers and exponents in expressions

Vocabulary

Base

The number that is multiplied (the factor)

35

Three is the base

Vocabulary

Exponent

Tells how many times the base is used as a factor

35

Five is the exponent

Vocabulary

Power

The number that is expressed using an exponent

35

Five is showing the “power of 5”

Review Vocabulary

Squared

When the exponent is two

32

Three squared

Vocabulary

Cubed

When the exponent is 3

33

Three cubed

Example 1 Write an Expression Using Powers

Example 2 Evaluate Powers

Example 3 Evaluate Powers

Example 4 Evaluate Powers

Answer: p4q3

Write using exponents.

Write the first letterp

Count number of p’s listed4

This will be the exponent to the letter p

q3

1/4

Write the next letter not used

Count number of q’s listed

This will be the exponent to the letter q

Answer: x3y4

Write using exponents.

1/4

Answer:

Evaluate . Write problem

95 Use calculator

Push the = sign

2/4

Put in base which is 99 Push the [yx] key

Put in exponent which is 5

[yx] 5 =

59,049

Answer: 7,776

Evaluate .

2/4

Evaluate

Write problem

3-7

The negative exponent means to reciprocate and change exponent to positive

137

Remember: Reciprocate means to put the numerator in the denominator and the numerator

Do not write as decimal

3/4

Put 1 in the numerator and draw fraction bar

Put the 37 in the denominator and remove the negative

Answer:

Evaluate

3-7

137

3/4

Bring down the 1 in numerator and fraction bar

Find 37

Answer:

Evaluate

3/4

Answer: 2,048

ALGEBRA Evaluate if and

Write problemx3 · y5

Replace x with 443 · 25

Find 43

64 · 32

Find 252,048

4/4

Replace y with 2

Multiply

Answer: 2,304

ALGEBRA Evaluate if andALGEBRA Evaluate

*

4/4

Assignment

Lesson 2:8 Powers & Exponents 15 - 41 All