Ray's New Primary Arithmetic · Lesson LXXXVIII · Unit 8: Money, weights and measures
88. Dozens, scores and other old measures optional
Goal: Optional. Your child meets the dozen, gross and score, and other measures from old books.
You'll need
- An egg carton
What's in the book
Tables only: circular measure (degrees), paper (quires and reams), how books are folded (folio, quarto, octavo), and miscellaneous tables such as 12 things make 1 dozen, 12 dozen make 1 gross, 20 things make 1 score, 6 feet make 1 fathom, 4 inches make 1 hand.
The lesson, step by step
Useful ones
Dozen and gross are still used. A score is 20: "Four score and seven years ago" means 87.
Fun ones
Horses are measured in hands; sea depth in fathoms. Look up how tall a horse is in hands.
Afterwards
Optional.