Calculating conversions within a measurement system

4.8B- Convert measurements within the same measurement system, customary or metric represented in a table.

By Rolando Alvarez

Multiple Choice

What measurement system do we use in the United States?

• Metric system

• Customary/ Imperial system

​Imperial/ Customary System

The U.S. is one of the few countries globally which still uses the Imperial System of measurement, where things are measured in feet, inches, pounds, ounces, etc.​

​The Metric System

​The metric system is the most used measurement system in the world. Only three countries in the world don't use the metric system: the United States, Liberia, and Myanmar. Every other country around the world uses the metric system. The metric system uses units such as grams, kilograms, centimeters, meters, kilometers, etc.

Multiple Choice

Feet and inches are part of what measurement system?

• Customary/ Imperial

• Metric

Multiple Choice

Mexico uses the customary/ Imperial system.

• True

• False

Multiple Choice

Centimeters and meters are part of the _____ system.

• Customary/ Imperial

• Metric

​Today's objective

We will calculate conversions within both measurement systems using function tables.

- Length

-​ Volume and capacity

-​ Weight and mass

​

​

Reference materials

to change smaller units into larger units.

divide /

to change larger units into smaller units.

​Multiply X

remember: When converting units

Make a note of this in your journals.

inches- feet

12 inches = 1 foot

function- a inches/12 = b feet

24 in. / 12= 2 ft.

48 in. / 12= 4 ft​.

Larger units

feet- inches

1 foot = 12 inches​

function- b feet x 12= a inches​

2 ft. x 12 = 24 in.

4 ft. x 12 = 48 in.​

​

​

​Smaller units

For example:

Always use variables in your functions* Always label your units* Always write the inverse function (equation)*

Multiple Choice

When converting a larger unit into a smaller unit (for example miles to yards), we must_____.

• Divide

• Multiply

Multiple Choice

When converting a smaller unit into a larger unit (for example yards to miles), we must_____.

• Divide

• Multiply

"direct flights"

Conversions that you have available on your reference materials, are going to be referred to as "direct flights".

Dallas to LA can be achieved in a direct flight.​

​

Open Ended

2 yards= ___ feet

Open Ended

3 pounds= ___ ounces

Sometimes we cannot make a direct conversion

we cannot take that "direct flight"​

​"Layovers"

Often times we will have to make conversions that have one or two "layovers" before we can arrive to our desired unit.

​example of a "layover"

How many feet are in 7 miles?

Poll

Is there a "direct flight" from miles to feet?

• Yes

• No

• I don't know how to tell

two or more "Layovers"

​

In order to arrive in Bangkok, Thailand from Dallas, you have two layovers. One in LA and another in Tokyo, Japan.​

​Let's go to Bangkok

How many fluid ounces(Bangkok) are in 8 quarts(Dallas)?

Poll

What have you learned from this lesson?

• Conversions can be direct, but sometimes you may have to make a few conversions before arriving at a specific unit.

• The Pacific Ocean is huge!

• We use the customary system in the USA.

• Mr. A really loves traveling to Asian countries.

• Conversions are easy to do using some type of function table.

Time for some practice!

Remember to look for direct flights and layovers*