American Mental Arithmetic

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 edition. Excerpt: ...system of weights and measures originated in France in 1795. It has been adopted in Austria, Belgium, Brazil, Denmark, Germany, Greece, Holland, Sweden, and Switzerland. Its use has been authorized by the Congress of the United States and by the Parliament of Great Britain. It is destined to displace the English system, and is already exclusively used in scientific research. To illustrate long measure, prepare a strip of paper 39 in. long; divide it into 10 equal parts (dm.); divide each dm. into 10 equal parts (cm.); divide the first cm. into 10 equal parts (mm.). To illustrate land measure, stake out on the playground a square 10 m. x 10 m.; this square will mark an are. To illustrate wood measure, lay off on the playground a square 1 m. x 1 m.; at each corner drive a stake leaving 1 m. above ground; these stakes will hold a stere of wood. To illustrate weights, procure a piece of tinfoil that weighs as much as a nickel 5 piece; cut the foil into five equal parts; each part will weigh 1 g. By law, the nickel must weigh 5 g. Procure a stone that weighs 2 lb. 3 oz.; it will weigh a kilogram (nearly'). To illustrate measures of capacity, draw on paper, rectangles as ABCD (see p. 97), having the dimensions given in the table; complete AEFD, and cut it out; roll over AD to BO, and paste BEFO, forming cylinders; these cylinders will hold the amounts given in the table. 1. State the unit of long measure, how it was obtained, and its English equivalent. 2. Describe in full the unit of weight (see p. 94). 3. Describe in full the unit of land measure. 4. Describe in full the unit of capacity. 5. Describe in full the unit of wood measure. 6. Name the Latin submultiples, and give their values. 7. Name the Greek submultiples, and give their values....show more

Product details

• Paperback | 28 pages
• 189 x 246 x 2mm | 68g
• United States
• English
• black & white illustrations
• 1236805402
• 9781236805409