Rulers

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Rulers
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Metric Rulers

• Metric rulers easy to read.
• Use millimeters and centimeters only.
• No fractions since they also are in increments of
  ten.

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MM

• The larger lines are centimeters, the smaller
  lines are millimeters.
• Millimeters are 1/10th of a centimeter
• CM

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Standard Rulers

• Are more difficult to read.
• Because they deal with complex fractions, which
  are difficult to use.

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What is a fraction?

• A fraction is a number that can represent a part
  of a whole number.
• PARTS
• numerator (top) denominator (bottom)
• these two numbers make up the fraction. 3
• 4

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Reducing Fractions

• Fractions need to be reduced to there simplest
  form.
• Step 1 find the greatest common multiple(GCM)
• Step 2 divide the GCM in the numerator and the
  denominator.

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Reduce These Fractions

• 10 4
• 8
• 5 14
• 8 16

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• A ruler marked in 8ths. Every mark is 1/8th of an
  inch.

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A ruler marked in 16ths. Every mark is 1/16th of
an inch.
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Notice there are 16 lines in-between each inch.
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