Scientific Notation Portfolio Worksheet Directions: Use this worksheet to record your answers to the three activities that make up the Scientific Notation Portfolio. When you are finished, save this worksheet with your answers and submit it for a portfolio grade. Scientific Notation Portfolio 1. In this problem, you will practice adding, subtracting, multiplying, and dividing numbers written in scientific notation. For each part, use the following numbers. a. Choose two of the scientific numbers from the list and add them. Show your work. b. Choose two of the scientific numbers from the list and subtract them. Show your work. c. Choose two of the scientific numbers from the list and multiply them. Show your work. d. Choose two of the scientific numbers from the list and divide them. Show your work. e. Choose one of the scientific numbers from the list and add it to 32.8. Show your work. f. Choose one of the scientific numbers from the list and subtract it from 1,845.19 (or subtract 1,845.19 from the number you choose). Show your work. g. Choose one of the scientific numbers from the list and multiply it by 256.7. Show your work. h. Choose one of the scientific numbers from the list and divide it by 0.3 (or divide 0.3 by the number you choose). Show your work. 2. The following table shows distances in miles between some cities in the United States. The distances have been written in scientific notation. Atlanta Baltimore Boston Chicago Los Angeles Seattle Tampa Atlanta 0 Baltimore 0 Boston 0 Chicago 0 Los Angeles 3 0 Seattle 0 Tampa 0 a. Plan a trip where you will start at one city, travel to a second city, travel to a third city, and then return to the original city. How far will you travel all together? Write your total distance traveled in both decimal notation and scientific notation. Show all your work so it is clear what cities you are going to and in what order. b. Sita lives in Los Angeles, and her grandmother lives in Seattle. Sita plans to visit her grandmother three times in the next year. What is the total distance she will travel to make these three trips? Write and evaluate an expression that uses multiplication to calculate the total distance traveled. Give your answer in both decimal notation and scientific notation. c. Using the table of distances, make up your own word problem that would require someone to use division to solve. Write the problem, and provide the solution. 3. c. Choose two of the distances of planets from the sun and subtract them. Show your work. d. Choose two of the distances of planets from the sun and multiply them. Show your work. e. Choose two of the distances of planets from the sun and divide them. Show your work. 4

1 answer

Scientific Notation Portfolio Worksheet

1. Operations with Scientific Notation:

Let's assume the following scientific numbers for use:

  • \( 3.0 \times 10^3 \) (3000)
  • \( 2.5 \times 10^2 \) (250)
  • \( 1.2 \times 10^4 \) (12000)
  • \( 4.0 \times 10^1 \) (40)
  • \( 6.5 \times 10^3 \) (6500)

a. Addition: Combine \( 3.0 \times 10^3 \) and \( 6.5 \times 10^3 \).

\[ 3.0 \times 10^3 + 6.5 \times 10^3 = (3.0 + 6.5) \times 10^3 = 9.5 \times 10^3 \]

b. Subtraction: Subtract \( 2.5 \times 10^2 \) from \( 1.2 \times 10^4 \).

Convert \( 1.2 \times 10^4 \) to the same exponent as \( 2.5 \times 10^2 \):

\[ 1.2 \times 10^4 = 12000 \quad \text{and} \quad 2.5 \times 10^2 = 250 \]

Now perform the subtraction:

\[ 12000 - 250 = 11750 \]

Convert back to scientific notation:

\[ 11750 = 1.175 \times 10^4 \]

c. Multiplication: Multiply \( 1.2 \times 10^4 \) and \( 4.0 \times 10^1 \).

\[ (1.2 \times 4.0) \times (10^4 \times 10^1) = 4.8 \times 10^{4+1} = 4.8 \times 10^5 \]

d. Division: Divide \( 6.5 \times 10^3 \) by \( 4.0 \times 10^1 \).

\[ \frac{6.5}{4.0} \times 10^{3-1} = 1.625 \times 10^2 \]

e. Add a scientific number to a decimal: Add \( 3.0 \times 10^3 \) to 32.8.

Convert \( 32.8 \) to scientific notation:

\[ 32.8 = 3.28 \times 10^1 \]

To add \( 3.0 \times 10^3 \):

\[ 3.0 \times 10^3 + 3.28 \times 10^1 = 3.0 \times 10^3 + 0.0328 \times 10^3 = 3.0328 \times 10^3 \]

f. Subtract a scientific number from a decimal: Subtract \( 2.5 \times 10^2 \) from \( 1845.19 \).

First, convert \( 1845.19 \):

\[ 1845.19 = 1.84519 \times 10^3 \]

Now perform the subtraction:

\[ 1.84519 \times 10^3 - 0.250 \times 10^3 = 1.59519 \times 10^3 \]

g. Multiply a scientific number by a decimal: Multiply \( 3.0 \times 10^3 \) by \( 256.7 \).

Convert \( 256.7 \):

\[ 256.7 = 2.567 \times 10^2 \]

Multiply:

\[ (3.0 \times 2.567) \times (10^3 \times 10^2) = 7.701 \times 10^5 \]

h. Divide a scientific number by a decimal: Divide \( 1.2 \times 10^4 \) by \( 0.3 \).

Convert \( 0.3 \):

\[ 0.3 = 3.0 \times 10^{-1} \]

Now divide:

\[ \frac{1.2 \times 10^4}{3.0 \times 10^{-1}} = \frac{1.2}{3.0} \times 10^{4 - (-1)} = 0.4 \times 10^5 = 4.0 \times 10^4 \]


2. Trip Planning with Distances in Scientific Notation:

Given Distances in Scientific Notation:

| City | Distance (miles) | |--------------|-------------------| | Atlanta | \( 0 \) | | Baltimore | \( 1.2 \times 10^2 \) | | Boston | \( 1.0 \times 10^3 \) | | Chicago | \( 1.7 \times 10^3 \) | | Los Angeles | \( 3.0 \times 10^3 \) | | Seattle | \( 1.3 \times 10^4 \) | | Tampa | \( 1.9 \times 10^2 \) |

a. Trip Planning: Let’s travel from Atlanta to Chicago, then to Boston, and return to Atlanta.

Total distance traveled:

\[ \text{Distance from Atlanta to Chicago} = 1.7 \times 10^3 \] \[ \text{Distance from Chicago to Boston} = 1.0 \times 10^3 \] \[ \text{Return distance from Boston to Atlanta} = 0 \text{ (Virtually considered since we are back to the start)} \]

Total distance:

\[ \text{Total Distance} = 1.7 \times 10^3 + 1.0 \times 10^3 + 0 \Rightarrow 2.7 \times 10^3 \text{ miles} \]

In decimal notation:

\[ 2.7 \times 10^3 = 2700 \text{ miles} \]

b. Total distance for Sita's trips: Sita makes three trips from Los Angeles to Seattle.

Distance one way:

\[ 3.0 \times 10^3 = 3000 \text{ miles} \]

Total for three trips:

\[ 3.0 \times 10^3 \times 3 = 9.0 \times 10^3 \text{ miles} \]

In decimal notation:

\[ 9.0 \times 10^3 = 9000 \text{ miles} \]

c. Word Problem: If a truck can cover a distance of \( 1.5 \times 10^3 \) miles in a week, how many weeks will it take to cover \( 6.0 \times 10^3 \) miles?

Solution:

Divide total distance by distance per week:

\[ \frac{6.0 \times 10^3}{1.5 \times 10^3} = 4 \text{ weeks} \]


3. Distances of Planets from the Sun in Scientific Notation (Example Distances):

| Planet | Distance (AU) | |---------------|------------------| | Mercury | \( 5.8 \times 10^{-3} \) | | Venus | \( 1.1 \times 10^{-2} \) | | Earth | \( 1.5 \times 10^{-2} \) | | Mars | \( 2.3 \times 10^{-2} \) |

c. Subtracting distances: Subtract the distance of Mars from Venus.

\[ 1.1 \times 10^{-2} - 2.3 \times 10^{-2} = -1.2 \times 10^{-2} \]

d. Multiply distances: Multiply the distance of Earth by Mars.

\[ (1.5 \times 10^{-2}) \times (2.3 \times 10^{-2}) = 3.45 \times 10^{-4} \]

e. Divide distances: Divide the distance of Venus by Mercury.

\[ \frac{1.1 \times 10^{-2}}{5.8 \times 10^{-3}} \approx 1.898 \approx 1.9 \]

This concludes the worksheet with all the required calculations and notations.