AnswersFL-1205070-MJ Grade 8 Pre-Algebra Summer 2026Operations with Scientific Notation

Addition and Subtraction with Scientific Notation Answers

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When evaluating , what will be the exponent of 10 in the product?

Question illustration
A
3
B
5
C
8
D
15
2
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Matsu wants to measure the dimensions of her vegetable garden. Which unit of measurement should she use to eliminate the need to write the values in scientific notation?

A
inches
B
feet
C
cups
D
tons
3

A cell phone weighs about pounds. Which value of n is most reasonable?

Question illustration
A
Negative 3
Option A
B
Negative 1
Option B
C
0
D
1
4

What is in scientific notation?

Question illustration
A
5.291 times 10 Superscript negative 64
Option A
B
5.291 times 10 Superscript negative 4
Option B
C
5.291 times 10 Superscript 12
Option C
D
5.291 times 10 Superscript 20
Option D
5

When evaluating , what will be the exponent of 10 in the quotient?

Question illustration
A
3
B
4
C
8
D
16
6

The product of and a number n results in . What is the value of n?

Question illustration
A
2 times 10 Superscript negative 8
Option A
B
2 times 10 Superscript negative 3
Option B
C
2 times 10 Superscript 16
Option C
D
2 times 10 Superscript 48
Option D
8

A passenger car weighs units. Which unit of measure was used?

Question illustration
A
grams
B
ounces
C
pounds
D
tons
9

Bethany wants to estimate the value of . Which statement about the estimate is true?

Question illustration
A
The value will be greater than 1 because is a very large number and multiplication always increases the size of a number.
Option A
B
The value will be greater than 1 because and 8 is larger than 1.
Option B
C
The value will be less than 1 because will be a negative number. All negative numbers are less than one.
Option C
D
The number will be less than 1 because when adding the exponents, , and a number in scientific notation with a negative exponent is less than 1.
Option D
10

What is the value of in scientific notation?

Question illustration
A
2.226 times 10 Superscript 6
Option A
B
22.26 times 10 Superscript 7
Option B
C
2.226 times 10 Superscript 8
Option C
D
22.26 times 10 Superscript 12
Option D
11

Leah is measuring the weight of adult rhinos at the zoo. Which unit of measurement should she use to eliminate the need to write the values in scientific notation?

A
grams
B
feet
C
gallons
D
tons
12

A 747 airplane weighs about 600,000 pounds. It can also be expressed as approximately tons. If there are 2,000 pounds in 1 ton, which is the most reasonable value of n?

Question illustration
A
–2
B
–1
C
2
D
4
13

A football field measures 300 feet in length. It can also be expressed as approximately miles. If there are 5,280 feet in 1 mile, which is the most reasonable value of n?

Question illustration
A
Negative 3
Option A
B
Negative 2
Option B
C
2
D
3
14

Ruchi measured the area of her kitchen as square units. When she recorded the area, she wrote square feet. Which statement about her labeling of the units is true?

Question illustration
A
She is correct because dimensions of rooms must always be measured in feet and area would be square feet.
B
She is correct because ft is equivalent to 2, 810 ft, which is an average size for a kitchen since area is always so much more than length.
Option B
C
She is incorrect because is around 30,000 so the units must be smaller than feet. She most likely measured in inches.
Option C
D
She is incorrect because 2.81 is a small number. She probably measured in yards to arrive at such a small value.

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