Mental Arithmetic, Or First Lessons in Numbers for Children

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J.C. Derby & Company, 1847
 

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Página 98 - November ? 2 men do a piece of work in 30 days ; how long will it take...
Página 45 - There are eight rows of trees in an orchard, and seven trees in a row : how many trees are there in the orchard ? 8.
Página 74 - ... can 4 men do the same ? 13. If 9 men can do a piece of work in 8 days, how many men can do the same in 12 days? 14. If 4 men can do a piece of work in 6 days, in how many days can 3 men do twice as much work ? 15. A farmer sold 2 tons of hay at $20 a ton, and for pay received 8 yards of cloth at $4 a yard, and the rest in money ; how much money did he receive ? 16. If a man earns $24 in 2 months, what will 2 men earn in 6 months ? 17.
Página 28 - Frank than John ? 4. A man bought a cow for ten dollars, and gave a barrel of flour worth five dollars, and paid the rest in money : how much money did he pay ? 5. If a bushel of wheat costs nine shillings, and a bushel of corn five shillings, what is the difference in their price ? 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. If you had eleven dollars and should pay five dollars...
Página 65 - The dividend is the number to be divided. The divisor is the number by which we divide.
Página 4 - Witn this brief explanation of the object and plan of the work, the author commends it to the friends of education, by whom his former efforts to subserve this noble cause,have been so favorably received. Although designed particularly as an introduction to the
Página 83 - ... each of the parts called ? Ans. One fourth, or one quarter. 10. What is meant by 2 fourths? By 3 fourths? 11. If you divide a stick of candy in fourths, and give 3 fourths of it to your companions, what part of it would you have left ? 12. If you give away 1 fourth, what part would be left? " 13. Two fourths and one fourth make how many fourths ? Three fourths and one fourth, make how many fourths ? 14. How ma.ny fourths make a whole one ? LESSON II. 1. What is meant by 1 fifth ? Ans. When any...

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