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DATE
PERIOD
Unit 7: End-of-Unit Assessment
Do not use a calculator.
1. Select all the expressions that equal 4 × 106 .
A. (2 × 108 )(2 × 10−2 )
B. 40 × 105
C. 406
D. 400,000
E.
1.2×109
3×102
2. Select all the expressions that equal 6−10 .
A. 6−5 ⋅ 62
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B. (62 )
C. (6−5 )2
6−3
D. 67
E.
65 ⋅6−3
6−8
3. About 3.9 × 107 people live in California. About 1.3 × 106 people live in Maine. About
how many more people live in California than live in Maine?
A. 2.6 × 106
B. 2.6 × 107
C. 3.77 × 106
D. 3.77 × 107
4. What number is represented by point 𝑃?
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5. In 2015, there were about 22 million teenagers (aged 13–17) in the United States.
They each sent an average of 900 text messages per month. About how many text
messages did all of the teenagers in the United States send each month? Express your
answer using scientific notation.
6. Place a number in each box so that each equation is true and each equation has at least
one negative number.
a. 2
b.
23
2
⋅2
= 20
=2
c. 2−3 ⋅
−3
= 10
7. Here are the approximate populations of three countries, expressed in scientific
notation: Panama: 4 × 106 ; Peru: 3.2 × 107 ; Thailand: 7 × 107 .
a. Lin says that more than 20 times as many people live in Thailand than in Panama.
Is this correct? Explain how you know.
b. Decide what power of 10 to put on the label for the rightmost tick mark of this
number line so that all three countries’ populations can be distinguished.
c. Label each tick mark as a multiple of a power of 10.
d. Plot and label the three countries’ populations on the number line.
Adapted from Open Up Resources under CC BY license. All adaptations © LearnZillion.
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