Units And Conversions Worksheets
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10Basic Arithmetic
Lesson 9 – Units & Conversions
LESSON 9 – UNITS & CONVERSIONS
INTRODUCTION
U.S. units of measure are used every day in many ways. In the United States, when you
fill up your car with gallons of gas, drive a certain number of miles to work, or buy a
quart of milk you are utilizing U.S. units of measure. There is another measuring system
also seen in the U.S. but more prevalent in other countries and that is the metric system.
The metric system is easier to use than the U.S. system because all the units are
incremented by different powers of 10. The U.S. has never fully converted to the metric
system but metric units are all around us as well. In this lesson, we will learn how to
work within and between the two systems.
The table below shows the specific objectives that are the achievement goal for this
lesson. Read through them carefully now to gain initial exposure to the terms and concept
names for the lesson. Refer back to the list at the end of the lesson to see if you can
perform each objective.
Lesson Objective
Related Examples
Perform one-step conversions of U.S. units
1, 2, YT10
Convert using U.S. mixed units
3, 4, 5, 6, YT10
Perform multi-step conversions of U.S. units
7, 8, 9, YT10
Add and subtract U.S. units of measure
11, 12, YT13
Perform conversions within the metric system
14, 15, YT16
Perform conversions between the U.S. and metric system
17, 18, YT19
KEY TERMS
The key terms listed below will help you keep track of important mathematical words and
phrases that are part of this lesson. Look for these words and circle or highlight them
along with their definition or explanation as you work through the MiniLesson.
• U.S. System of Measure
• U.S. Units and Abbreviations
• U.S. Unit Conversions
• U.S. Mixed Units
• Metric System
• Metric Units and Abbreviations
• Metric Unit Conversions
• U.S./Metric Conversions
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