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Clear off desk and get out something to write with

Learn how to change units using Dimensional Analysis. Steps included for converting $50 to nickels and other unit conversions. English System and common equalities provided. Practice worksheet included.

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Clear off desk and get out something to write with

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  1. Clear off desk and get out something to write with

  2. Turn to page 12 • Leave page 11 BLANK!!

  3. Dimensional Analysis

  4. Dimensional Analysis: A mathematical tool used to convert from one type of unit to another type of unit

  5. Situation:You need to change $50 dollars into nickels. How many nickels do you need ???

  6. We need a plan of attack! (4 Steps) 1. Write down what we are given

  7. We need a plan of attack! 1. Write down what we are given 2. Find a common ratio $1 dollar = 20 nickels

  8. We need a plan of attack! 1. Write down what we are given 2. Find a common ratio $1 dollar = 20 nickels 3. Place the ratio on the ladder so the unit that’s given is on the bottom

  9. Situation:You need to change $50 dollars into nickels. How many nickels do you need ???

  10. We need a plan of attack! 1. Write down what we are given 2. Find a common ratio $1 dollar = 20 nickels 3. Place the ratio in the chart so that unit that is in the given is on the bottom 4. Simplify!!!

  11. 1000 nickels Simplify means cancel out units and do the math (Multiply the top and divide on the bottom)

  12. inches

  13. English System inches feet yard mile

  14. English System mm inches feet yard mile

  15. English System mm inches cm feet dm meter yard mile km

  16. English System mm inches cm feet dm meter yard mile km

  17. English System mm inches cm feet 1 dm meter yard mile km

  18. English System mm inches cm feet 1 2.54 dm meter yard mile km

  19. Common equalities: • 1 inch = 2.54 cm • 60 seconds = 1 minute

  20. Equalities 1 m = 10 dm 1 mile = 5280 ft. 3 ft. = 1 yard 1 m = 3.28 ft. 2.54 cm = 1 inch

  21. English System mm inches cm feet 1 2.54 3.28 dm meter 1 yard 1.09 mile km 1.61 1

  22. Problem 1: Convert - 8.5 cm = ? inches

  23. Problem 1: 1 in 8.5 cm ______________ 2.54 cm = 3.35 in.

  24. Problem 2: 12.75 cm = ? in 1 in 12.75 cm ______________ 2.54 cm = 5.02 in.

  25. Problem 3: 32ft second = meters min ?

  26. Problem 3: 1 m 60 sec 1 min 32 ft ______________ sec 3.28 ft 585.37 m_ min =

  27. Worksheet: Dimensional Worksheet #1 DUE:

  28. Worksheet: Dimensional Worksheet #1 DUE: In 20 Min.

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