As facility in adding numbers is of the utmost importance in business, the teacher will consult the best interest of his scholars, especially those who are somewhat advanced in Arithmetic, by frequently exercising them, either singly or simultaneously in classes, in adding up the following rows of figures, until they can arrive at a correct result, with the utmost despatch. 104 104 98 116 117 123 138 107 128 137 EXAMPLES FOR MENTAL EXERCISE, SERIES I. 1. If you have 5 cents, and I give you 5 more, how many cents will you then have? How many are 5 and 5? 2. If you have 6 marbles in one pocket, and 6 in another, how many marbles have you in both? 3. If you pay 7 cents for nuts, and 4 for apples, how many cents do you pay away? 4. A boy bought a book for 8 cents, and a top for 7 cents; how many cents did he pay for both? 5. A man paid 9 dollars for a plough, and 6 dollars for a sled; how many dollars did he pay for both? 6. How many are 9 and 6? How many are 8 and 7 ? 7. John caught 11 fishes, and Charles caught 9; how many did both catch? How many are 11 and 9 ? 8. A merchant sold 12 barrels of flour to one man, and 6 barrels to another, how many did he sell to both? 9. On the 4th of July, George spent 8 cents, Henry spent 7 cents, and John 6 cents; how many cents did all three spend ? How many are 8, 7 and 6? 10. John lost 9 marbles at play, and then had 9 left; how many had he at first? How many are 9 and 9? 11. A market woman sold her berries for 25 cents, and her eggs for 8 cents; how many cents did she get for both? 12. A merchant sold 15 barrels of flour, and had 9 barrels left; how many barrels had he at first? 13. A farmer bought a cow for 26 dollars, and sold her for 5 dollars more than he gave for her; how many dollars did he get for his cow? 14. If you buy a sled for 37 cents, and wish to make 8 cents by selling it, how much must you ask for your sled? How many are 37 and 8? 15. If you buy 16 marbles of Thomas, and 9 of John, how many marbles will you then have ? 16. Julia had 13 cents, and her mother gave her 7 more; how many cents had she then ? 17. How many are 7 and 8? 9 and 6? 12 and 9? SECOND SERIES OF MENTAL EXAMPLES. 1. Eleven sheep were in a pasture, and 4 more were turned in with them; how many sheep in all ? 2. If you pay 11 cents for a book, and 5 cents for quills, how many cents do you pay for both? 3. A boy found 6 cents, and his brother gave him 11 cents more; how many cents had he then ? 4. A miller ground 11 bushels of rye, and 7 bushels of corn; how many bushels of both? 5. If I borrow 11 dollars from one man, and 9 dollars from another, how many dollars will pay them both? 6. There were 12 boys skating on a pond, and 4 boys were sliding; how many boys were on the pond? 7. If I pay 12 dollars for a cart, and 6 dollars for a plough, how much do I pay for both? 8. A butcher bought 13 fat sheep, and 6 lambs; how many in all? How many are 13 and 7? 13 and 4? 13 and 5? 9. A boy had 13 cents in one pocket, and 8 cents in another; how many in all? How many are 13 and 9? 13 and 10? 10. If 14 cows and 8 oxen are in one pasture, how many in all? How many are 14 and 6? 14 and 9? 11. A man bought a cow for 16 dollars and her calf for 5 dollars; how much for both? 12. A boy earned 17 cents, and found 6 cents; how many How many are 17 and 8 ? cents had he in all? 13. A man travelled 18 miles one day, and 9 miles the next; how many in all? How many are 18 and 8? 14. A young man entered college when he was 19 years old, and stayed 4 years; how old was he then? 15. A man earned 19 dollars, and a boy 7 dollars; how many dollars did both earn? How many are 19 and 8? THIRD SERIES OF MENTAL EXAMPLES. 1. A boy in a store took 25 cents for 2 yards of cloth, and 8 cents for a piece of tape; how many did he take for both? 2. A farmer sold 27 bushels of corn, and 7 bushels of oats; how many bushels of both? How many are 26 and 5? 3. A school consists of 28 boys and 8 girls; how many scholars are there in the school? 4. John did 21 sums, and Charles did 9; how many did both do? How many are 84 and 6 ? 97 and 5? 95 and 8? 5. There were 34 ducks in a pond, and 8 more lit down with them; how many in all ? 6. A man and his son went a fishing; the man caught 46, and his son 7; how many were caught by both? 7. A drover bought 57 lambs, and 8 old sheep; how many in all? How many are 21 and 5? 32 and 6 ? 8. If 65 scholars are in a school, and 9 more join it, how many scholars will there then be ? 9. A man owed 78 dollars, and got trusted for 6 more; how much did he then owe? How many are 36, 9 and 5? 10. A boy spent 87 cents, and had 8 cents left; how many had he at first? How many are 75 and 7? 36 and 4? 11. John had 26 marbles, Thomas had 7, and Charles 6; how many had all 3? How many are 25 and 12? 12. A man had 36 cows, 7 steers, and 6 heifers; how many in all? How many are 43, 9 and 2? 19, 7 and 4? 13. If I pay 13 dollars for labor, 6 dollars for provisions, and 3 dollars for wood, how much do I pay for all? 14. A sportsman shot 23 plover, 8 quails, and 4 partridges ; how many in all? How many are 33, 6 and 3? 15. How many are 6, 9 and 4? 8, 7 and 3? 11, 10 and 13, 7 and 8? 14, 8 and 6? 21, 9 and 4? 37, 3 and 5 46, 3 and 1? 57, 4 and 9? 66, 3 and 11? 75, 5 and 8 B |