687. 3. Let the pupil read the following numbers:-1. 345. 142 9. 6,744 | 13. 11,504 2. 76 6. 279 10. 8,329 14. 50,603 3. 758 11. 4,960 15. 124,769 4. 95 | 8. 423 12. 9,080 16. 784,984 4. Let the pupil express the following numbers in figures:1. Seventy-eight. 2. Ninety. 3. One hundred and fifty-six. 4. Three hundred and eight. 5. One thousand, four hundred and sixty-nine. 6. Five thousand and two. 7. Seventy-seven thousand and eighty-four. 8. Forty thousand, seven hundred and twenty-two. Five hundred and sixty-six thousand, one hund red and fifty: 10. Six hundred thousand. ADDITION. 5. 5 and 4 and 7 are how many ? This is called a question in addition. We put together or add the numbers 5, 4 and 7 to find their sum or amount. Thus, the sum of 5 and 4 and 7 is 16. Ex. 1. What is the sum of 46 and 37 ? It is most convenient to write the numbers in order, units under units, tens under tens, &c.; 46 then beginning with the units, we find that 37 6 units and 7 units are 13 units, or 1 ten and 3 We write down the 3 units under the units and add the 1 ten to the other tens ; 1 (ten) and 4 (tens) and 3 (tens) make 8 (tens) which written with the 3, makes 83. units. 83 Units. Ex. 2. What is the sum of 736 and 875 and 394? Hundreds. Adding the units we find 6 and 5 are 11, and 4 are 15, or 1 ten and 5 units. Writing the 5 under the column of units, we reserve 7 36 the 1 ten and add it to the tens of the next 875 column; thus, 1 and 3 are 4, and 7 are 11, and 3 9 4 9 are 20 (tens) or 2 hundreds, and 0 tens. We write the 0 under the column of tens, and add the 2 (hundreds) to the column of hundreds ; thus 2 and 7 are 9, and 8 are 17, and 3 are 20 (hundreds), which being the sum of the last column we write down. The answer, therefore, is 2005. 2005 60 24. 234 362 403 25. 311 525 293 26. 435 924 808 27. 731 311 579 28. 478 298 527 27 33 55 29. 500 314 409 30. 7667 1235 5555 31. 7543 1858 1776 1492 32. 1812 1732 2712 3333 33. 4648 4620 8665 452 34. 789 2253 226 45 35. 990 6209 2316 2201 36. 8 295 17 7897 37. 6540 6030 2709 5967 38. 38,924 67,798 54,554 33,333 39. 468 26,792 15,864 80,112 7. 40. Add together 39, 67, 92, 43, 84, 51. 41. Add together 270, 489, 126, 46. 8. 44. A merchant bought 4 pieces of cloth; for the first piece he gave 53 dollars; for the second, 78 dollars; for the third, 68 dollars; and for the fourth, 67 dollars. How much did he give for the whole? 45. In an orchard there are 22 peach trees, 95 apple trees, 17 pear trees and 56 plum trees. How many trees in the orchard ? 46. A man bought four horses ; for the first he gave 84 dollars; for the second, 150 dollars; for the third, 475 dollars; and for the fourth, 526 dollars. How much did he give for all the horses? 47. In the Boylston school there are 810 scholars ; in the Brimmer, 597 scholars; in the Dwight, 956 scholars ; in the Elliot, 776 scholars ; in the Franklin, 572 scholars; and in the Hancock, 731 scholars. How many scholars in these six schools ? 48. A gentleman, building a house, paid the mason 2,964 dollars, the carpenter 5,723 dollars, the plasterer 625 dollars and the painter 354 dollars. How much did the whole house cost? SUBTRACTION. 9. 9 less 7 are how many? This is called a ques. tion in Subtraction. We take away or subtract 7 from 9 to find the difference or remainder, which is 2. Ex 1. From 476 take 245. Hundreas. It is most convenient to write the less number under the greater, units under units, tens under tens, etc., as in addition. Beginning at 476 the units, we say 5 from 6 leaves 1, which we 2 45 write under the units; then 4 (tens) from 7 231 (tens) leaves 3 (tens), which we write under the tens; and 2 (hundreds) from 4 (hundreds) leaves 2 (hundreds), which we write down, and the answer is 231. e Hundreds. co Tens. Ex. 2. From 939 take 458. In this example we take 8 from 9 and there remains 1, which we write down ; but since we cannot take 5 (tens) from 3 (tens), we bor939 row 1 (hundred) or 10 (tens) from the 9 458 (hundreds), which, joined with the 3 (tens), 481 makes 13 (tens); then 5 (tens) from 13 (tens) leaves 8 (tens), which we write down. As one of the 9 (hundreds) has been put with the 3 (tens), there remains but 8 (hundreds). Therefore we say 4 (hundreds) from 8 (hundreds) leaves 4 (hundreds). This, written down, makes the answer 481. 6, 7, 8. From 18 58 35 68 82 95 Take 4 6 12 33 34 51 75 Ans. 14 3. 4. 5. 9. 59 10. From 285 Take 74 11. 467 46 12. 9685 5473 13. 7856 5722 14. 8744 4302 15, 2607 1405 37. From 96 take 58. 141. From 984 take 176 . 38. From 4785. take 3679. 42. From 4788 take 967. 39. From 8344 take 5324. 43. From 7898 take 6898. 40. From 10982 take 6470. 44. From 40816 take 5622. 10. 45. In a certain garden there were 86 rose bushes, but the worms destroyed 33 of them. How many were left ? 46. A man is 66 years of age, and his son 22. How old was the man at the birth of his son ? 47. A farmer had 240 sheep; but, one night, wolves gained admittance to the fold and carried off 121. How many sheep were left ? 48. Harry had 84 cents given him to buy some marbles with, but on his way to the store he lost 25 cents. How many cents had he left? 49. A girl was carrying 72 eggs to market, but she let the basket fall, and 39 eggs were broken. How many had she left? 50. In an army there were 14,642 men, but in a battle 789 men were killed or wounded. How many serviceable men were there left ? |