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Multiplying decimals

  1. Jan 1, 2010 #1
    This is probably a stupid question but I'm fairly confused about this. If I multiply 0.5 meters by 0.5 meters I get 0.25 meters. If I multiply 50 cm by 50 cm I get 250 cm (2.5 meters). What mistake am I making here?
     
  2. jcsd
  3. Jan 1, 2010 #2
    0.5m * 0.5m = 0.25m²

    50cm * 50cm = 2500cm²

    0.25m² = 2500cm²

    Your mistakes: 50*50 does not equal 250 and m*m does not equal m
     
  4. Jan 1, 2010 #3

    jtbell

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    Staff: Mentor

    To add to this:

    1 m = 100 cm

    (1 m)2 = (100 cm)2

    1 m2 = 10000 cm2
     
  5. Jan 1, 2010 #4
    Ah yeah that explains it. Thanks a lot.
     
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