1. Conversion Between Measurement Systems Length, Capacity, and Weight
7th Grade Math Lab

2. Conversion Between Measurement Systems
Objective: I will use and convert customary and metric units of measure.

3. Introduction to Standard and Metric Measurement
Why Learn to Measure?
Gateway To Technology
Unit 1 – Lesson 1.3 – Dimensioning
Valuable skill for a job
Valuable skill for hobbies
Valuable skill for every day life
“Although you are probably familiar with rulers, yard sticks, tape rules, folding rules, and tape measures, you will also find rulers on many machines that you use such as saws, sewing machines, photocopiers, and computer scanners. Computer programs like Microsoft Word and Adobe PhotoShop have electronic rulers that you can turn on to help you with the exact placement of items. As you can tell, reading a ruler is a valuable skill that you will use almost every day both on and off the job.”

4. Introduction to Standard and Metric Measurement
Gateway To Technology
Unit 1 – Lesson 1.3 – Dimensioning
Measurement Systems
Two types of measurement systems exist.
Standard (Customary)
Three countries have not officially adopted the International System of Units as their primary or sole system of measurement: Liberia, Myanmar, and the United States. The U. S. has switched to Metric with
Sporting Events - Olympics
Military
Medicine
Scientific studies
At this time, Manufacturing; Transportation; and Construction Industries; are primarily using the U.S. Customary system. In certain sectors, the conversion is obvious (i.e. – Automobiles). However, in these industry areas the changes have not been as complete.
This is the reasoning for studying both measurement systems used in the United States.
Metric (SI or International System)

5. Converting Between Measurement Systems
Length, weight and capacity are measured.
LENGTH
WEIGHT/MASS
CAPACITY

6. Glue tables into math spiral

7. Using Conversion Factors

8. Converting between Systems
Steps:
Write what you are given (with units) over one.
Choose the correct conversion factor for the unit you want
Multiply by the conversion factor so that units cancel out
Solve for the requested unit.
To change from a larger unit of measure to a smaller unit, MULTIPLY.
To change from a smaller unit of measure to a larger unit, DIVIDE.

9. Lets try a conversion…
1 inch = 2.54 Centimeters
A ruler is 12 inches long. What is the length of this ruler in centimeters?
_____________________ Centimeters

10. Customary Length 12 inches (in) = 1 foot (ft)
36 inches = 3 feet or 1 yard (yd)
5,280 feet = 1 mile (mi)
To change from a larger unit of measure to a smaller unit, MULTIPLY.
To change from a smaller unit of measure to a larger unit, DIVIDE.

11. This represents about 1 mile.
Customary Length
A mile is about half the length of Talladega Super Speedway.
Talladega is 2.9 miles long.
This represents about 1 mile.
Talladega Super Speedway

12. Customary Length
A yard is about the length of a walking stick.

13. Customary Length
A foot is about the length of a floor tile.

14. Customary Length
An inch is about the length of a drink bottle top.

15. Customary Capacity 4 quarts = 1 gallon (gal) 2 pints = 1 quart (qt)
2 cups = 1 pint (pt)
8 fluid ounces (fl oz) = 1 cup (c)
To change from a larger unit of measure to a smaller unit, MULTIPLY.
To change from a smaller unit of measure to a larger unit, DIVIDE.

16. Meet Mr. Gallon
1 gallon

17. Meet Mr. Gallon
4 quarts

18. Meet Mr. Gallon
8 pints

19. Meet Mr. Gallon
16 cups

20. Customary Weight 16 ounces (oz) = 1 pound (lb)
2,000 pounds = 1 ton (T)
To change from a larger unit of measure to a smaller unit, MULTIPLY.
To change from a smaller unit of measure to a larger unit, DIVIDE.

21. Customary Weight
A small car weighs about a ton.

22. Customary Weight
A bag of coffee weighs about 1 pound.

23. Customary Weight
An ounce weighs the same as 8 nickels.

24. From Table:
1 Quart = 0.95 L

25. Example 2: Lets look at our tables and find our conversion factor