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1 Units, Measurements, & Conversions
1 Units, Measurements, & Conversions
1 Units, Measurements, & Conversions
1 Units, Measurements, & Conversions
1 Units, Measurements, & Conversions
1 Units, Measurements, & Conversions
1 Units, Measurements, & Conversions
1 Units, Measurements, & Conversions
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1 Units, Measurements, & Conversions

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Transcript

  • 1. Units & Measurements Conversions and how they work!
  • 2. Conversion By Name “ centi”-means one hundredth, “milli” means one thousandth kilo Centi 1/100 Milli 1/1000 start
  • 3. We have used many units in this class so far! Remember: The Loop, The Cord, The “Yardstick” We can easily convert from one unit to the next by using “Conversion Factors” AKA ratios we already know or can find out! 1 in. = 2.54 cm 1 pcord = ??? cm 1 hoop = ??? In. Do you see where I am going???
  • 4. FUNNY THING IS….
        • algebraic use of units is similar to how we treated variables
        • just like 3x + 5x = 8x,
        • 3 in + 5 in = 8 in
    The units also cancel out like variables when dividing..You will see this in the next slide. Now that you know how these units act, we can get back to converting them…
  • 5. We are using equivalent equations to convert…. CM to INCHES Complete on calculator! Mr. Cadray talk to me about rounding please… read p. 5 and post questions
  • 6. The “mantra” goes like this
          • To convert, we multiplied by an expression that enabled us to cancel the unit we DON’T want (cm), to cancel and leave the units we DO want (in.)
  • 7. Other nice things to know when converting Sometimes we need to round! This will make our answer not exact! Or Approximate Let’s Practice a Few!
  • 8. Geometric Drawings and Pictures length can be described without units, given units are all the same  AB = 5 and BC = 10, AB + BC = AC, so AC = 5 + 10 or AC= 15 length given as an equation (equals number or equals name) AB = 5 or AC = AB + BC When a drawing is not present, start the problem drawing and writing all known lengths recognize parallel notation

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