# Mental Arithmetic, Or, First Lessons in Numbers for Children

Ivison, Phinney & Company, 1863 - 120 páginas

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### Contenido

 Sección 1 1 Sección 2 2 Sección 3 5 Sección 4 9 Sección 5 25 Sección 6 36
 Sección 7 41 Sección 8 56 Sección 9 70 Sección 10 84 Sección 11 104 Sección 12 117

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Página 70 - A pile of wood 8 feet long, 4 feet wide, and 4 feet high, contains 1 cord; and a cord foot is 1 foot in length of such a pile.
Página 68 - Weight is used by apothecaries and physicians in mixing medicines. 20 grains (gr.) make 1 scruple, marked sc., or 3. 3 scruples " 1 dram, " dr., or 3. 8 drams " 1 ounce, " oz., or 5. 12 ounces " 1 pound,
Página 20 - ... 6. A man bought a quantity of butter for twelve dollars, but finding it damaged, sold it for five dollars less than he gave for it : for how much did he sell it ? 7.
Página 38 - A man bought a cow for 10 dollars, and sold it for 16 dollars : how much did he make by his bargain ? 29. If Horatio buys 6 oranges, at 3 cents apiece, and sells them again for 4 cents apiece, how much will he make by his bargain ? • 30. In 5 times 8, how many times 10 ? 31. In 6 times 6, how many times 4 ? 32. In 8 times 3, how many times 6 ? 33. A butcher sold 8 pounds of beef for 56 cents : what was that a pound ? 34. A dairy-man sold 10 pounds of butter for 80 cents : how much did he get a...
Página 68 - It is frequently called linear or lineal measure. 12 inches (in.) make 1 foot, marked ft. 3 feet " 1 yard, " yd. 5| yards, or 16| feet " 1 rod, perch, or pole,
Página 61 - What will -J- of a ton of hay cost, which is worth 19 dollars per ton ? 56. What will -f of a cord of wood cost, at 23 shillings per cord '? 57. If a man can walk 35 miles in a day, how far can he walk in -^ of a day ? 58. James, having 38 apples, gave -J of them for a slate : how many apples did his slate cost him ? 59. What is 1 sixth of 40 ? 60. What is 1 seventh of 39 ? 61.
Página 50 - ... a third of a number is equal to as many units as 3 is contained times in that number ; a fourth of a number is equal to as many units as 4 is contained times in that number, &c. 7. How do you find a half of a number ? Ans. Divide the number by 2. 8. How find a third of a number ? How find a fourth of a number ? A fifth ? A sixth ? A seventh ? An eighth ? A ninth ? A tenth ? 9. What is 1 fourth of 12 dollars ? Of 16 dollars ? Of 20? Of 32? Of 24? Of 28 ? Of 36 ? Of 40? 10. If a ton of coal is...
Página 58 - If the numerator is less than the denominator, the fraction is called a proper fraction; if it is equal to or greater than the denominator, the -fraction is called an improper fraction.
Página 74 - Sheets make 1 Quire. 20 Quires " 1 Ream. 2 Reams " 1 Bundle. 5 Bundles
Página 14 - ... are how many ? 3. 1. A man bought a calf for 7 dollars, and sold it for 3. dollars more than he gave for it ; how much did he sell it for ? 2. Bought a barrel of cider for 2 dollars, and 20 bushels of apples for 8 dollars ; how many dollars did the whole cost ? 3. If a coat cost 10 dollars, and a pair of pantaloons 5 dollars, what will be the cost of both ? 4. A merchant bought 4 boxes of black tea, and 7 boxes of green tea ; how many...