systems of measurement imperial metric. the imperial system developed over hundreds of years, the...
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Systems of Measurement
imperial
metric
metric
metric
metric
metric
metric
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The Imperial System
• Developed over hundreds of years, the imperial system tried to use every day objects for units
• 1 inch = your thumb
• 1 foot = your foot
• On so on….
• But this did cause some problems…
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1 pound = a good sized throwing stone…
1 cup = the amount of water you can hold in your cupped hands.
And what makes it even more challenging, is that they broke everything into fractions, usually of 12s and 16s….
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Metric System
• The mathematics is much simpler than the imperial system (all factors of 10)
• The problem, is that some of the measures are hard to relate to (what is a decameter?...a milligram?....)
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So, we’ll start with the imperial system….
• We are going to begin with the mechanics of adding and subtracting imperial fractions….
To add or subtract fractions, we must have a CD!
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Basic Imperial Units
• Inch / Foot (length)
• Gallon (volume)
• Pound (weight)
• Fahrenheit (temperature)