Wednesday, October 14, 2009

Scribepost for Oct. 14

Today in class, we were assigned to write definitions for these keywords:
  • Two-term ratio.
  • Three-term ratio.
  • Part-to-part ratio.
  • Part-to-whole ratio.
Two-term ratio
  • Compares two quantities measured in the same units.
  • Written as a:b or a to b. Blue:red is 6:4.

Three-term ratio
  • Compares three quantities measured in the same units.
  • Written as a:b:c or a to b to c. Blue:red:brown is 6:4:2.

Part-to-part ratio
  • Compares different parts of a group to each other.
  • 10:8 is the part-to-part ratio of brown to red beads.

Part-to-whole ratio
  • Compares one part of a group to the whole group.
  • 5:23 is the part-to-whole ratio of blue to total number of beads.

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