This post is a lesson about conversions between US and Metric systems using Unit Fractions.
Unit Fraction Conversions - Length lessons A, B, C):
Unit Fraction Conversions Lesson A
Unit Fraction Conversions Lesson B
Unit Fraction Conversions Lesson C
There is a worksheet below that you can use to "follow along" during the video.
Unit Fraction Mixed units:
Unit Fractions - Performing operations. Mixed Unit Lesson A
Define Metric units of length and convert back and forth
Perform operations on mixed units of metric length
Use the outline below to help guide you through the video lesson.
The following table will be required to "go back and forth" between these two different types of units.
Lets review the following web sites to reinforce the idea of conversions between units. This link will help give you an idea about what the metric system of units are relative to the basic equivalent of US unit.
US - Metric Measurements
The following link will have a number of exercises to help us bridge the gap in our understanding of metric vs, US measurements.
Metric Measurements
The basic concept of converting from one unit to another can best be explained with the following group of slides. After reviewing the above links - the following will show us the "how to" of converting.
The "how to" is shown to us very clearly in this series of slides. In the grid - start with the unit that you ALREADY have, in this case the unit of Meters.
Notice how the unit that we want to CONVERT TO is placed in the location indicated.
What we have done in this slide is we have recognized that there is a relationship between meters and centimeters. In other words we know that 100 centimeters is = to 1 meter. So it is in this manner that we set up a ratio as shown above. In the next slide you will see how like units cancel each other, leaving ONLY the desired unit behind (your answer).
Now we will add numbers to the units to make the problem a little more realistic.
Pay particular attention to how the #1 ALWAYS goes with the larger unit. This will allow you to avoid the confusion of which unit to put in the numerator and which unit to put in the denominator.
The reason the ratio is set up in this manner is that our goal is TO CANCEL one of the units leaving only the desired unit that we want to convert to.
We will expand on this concept later, but for now lets practice additional examples of the single step conversion that is shown here.
Unit Fractions:
Defining and Converting US System Units of Length: Follow this link and use the outline below as you view the video.
