Care must be taken, therefore, in writing numbers to be added, that all the units' digits shall fall in one column, all the tens' digits in the next column (to the left), and all the hundreds' digits in the next column, and so on. 39. To add columns of digits with absolute accuracy and great rapidity is a real accomplishment, and the operation of addition should be continued until both these results are secured. The beginner, however, will need some test of the accuracy of his work. One test is to begin at the bottom of the right-hand column in adding, and write on a piece of waste-paper the entire sum of each column; then to begin at the top of the left-hand column and write also the entire sum of each column; finally, to add the sums obtained in the first addition, and the sums obtained in the second addition, and compare the results. The study of an example will make the process understood. By comparing the results we find each sum to be 3,135,006, and so infer that the operation is correct. 2. 483, 1000, 8000, 648, 3750, 9840. 3. 15, 603, 1145, 6342. 4. 41, 725, 60, 425, 7000, 4900, 398. 8. 325, 6007, 983, 4050, 678, 9874. 9. 856, 9193, 8765, 4287, 6696, 9185, 979. 10. 7964, 5000, 303, 9784, 5673, 9004. 11. 9007, 34, 6876, 400, 9344, 7879. 12. 45,678, 96, 375, 4784, 9673, 11,980. 13. 7865, 3586, 4321, 8576. 14. 900,542 +308,970 + 555,674 + 498,785. 15. 456,789 +304,590 +600,792 +480,893 +514,763. 16. 357,963 +478,497 + 323,484 + 596,372 +300,409. 17. 706,96378,405 + 907,342 +503,476. 18. A man bought a sleigh for $142, a carriage for $325, and a pair of horses for $476. What was the cost of all? 19. A man collected on Monday, $1290; on Tuesday, $340; on Wednesday, $1008. How much was collected in all? 20. A lady paid $912 for a piano, $342 for furniture, $187 for linen, $46 for silver. What did she pay for all? 21. A farmer had in one flock of sheep, 407; in another, 96; and in a third, 2584. How many had he in all? 22. A man owns four houses; the first is worth $47,050; the second, $9106; the third, $1492; the fourth, $512. What is the value of them all? 23. Five loads of flour weighed as follows: 3500 pounds, 4967 pounds, 3974 pounds, 7982 pounds, 7963 pounds. What was the weight of the whole? 24. A house was bought for $7895; repairs amounted to $1500; new fences, $97; repairs on stable, $463; furniture, $1285. What was the cost of the whole? 25. The population of six 4000, 7096, 3784. towns is: 1674, 9008, 3769, Find the whole population. 26. A house-lot cost $675; for building the house and fur nishing materials the carpenters were paid $2245, the masons $540, the painters $320. What was expended on house and lot? 27. A merchant bought carpets to the amount of $4670; curtains, $300; paper-hangings, $1275; matting, $9765. What was the cost of the whole? 28. Find the sum of three hundred thousand six hundred fifty, seven thousand eight hundred thirty-two, eleven thousand five hundred sixty-seven, ten thousand fiftysix, four hundred seventy-two. 29. Find the sum of one hundred sixty-seven thousand, three hundred sixty-seven thousand, nine hundred six thousand, two hundred forty-seven thousand, ten thousand, seven hundred thousand, nine hundred. seventy-six thousand, one hundred ninety-five thousand, ninety-seven thousand. 30. Find the sum of two hundred seven, three hundred sixty-two, nine hundred forty-five, two thousand three hundred forty-three, fifteen thousand six hundred twenty-two, forty-five thousand eight. 31. Add 3 thousand 4 hundred 92, one thousand four, 6 thousand 5 hundred seventy, 42 hundred eleven. 32. Add 386 million 591, 546 million 311 thousand 122, 796 thousand 351, 84 hundred 1, 9 thousand, 86 thousand 521, 3 hundred fifty-eight thousand 6 hundred, 8 million 888 thousand eight hundred eightyeight, 1 hundred million. 33. Find the sum of six million sixty thousand six, seven million nine hundred fifty thousand ninety-nine, ten million nine thousand eight hundred seven, three hundred sixty-seven thousand forty-five. 34. Find the sum of 200 million 302 thousand, 200 thousand two hundred, 50 million 50 thousand 50, 25 million 860 thousand, 47 million 467 thousand, 202 million 6367. 35. What is the sum of eighteen thousand three hundred twenty, seventy-four thousand five hundred six, ten. hundred seventeen thousand nine hundred twentyone, fifty-three thousand seven hundred eleven, five hundred seventy-six thousand three hundred four, six hundred fifty thousand forty-four? 36. A man drew five loads of bricks; in the first load there were 4068; in the second, 1342; in the third, 3927; in the fourth, 1694; in the fifth, 2009. in all the loads? How many 37. What is the united population of the following cities: Utica, 28,804; Lowell, 40,928; Lynn, 28,236; Salem, 24,100; Erie, 19,500; Auburn, 17,225? 38. A fruit-grower sent to market the produce of six peach orchards; from the first, 7000 baskets; from the second, 6973; from the third, 1004; from the fourth, 3276; from the fifth, 1594; from the sixth, 3976. How many baskets in all? 39. The distance from Boston to Springfield is 98 miles, from Springfield to New Haven 62 miles, from New Haven to New York 76 miles. How many miles is it from Boston to New York? 40. An army officer paid at one time $7038 for horses, at another time $7776, at another time $9948. How many dollars did he pay in all? 41. A farmer sold his wheat for $8742, his corn for $13,569, and his oats for $9528. How much did he receive for the whole? 42. A bank has $40,317 in specie, $91,256 in bills, $18,317 in cash items. Find the whole amount. 43. The army of Napoleon at Waterloo consisted of 48,950 infantry, 15,765 cavalry, 7732 artillery. What was the whole number? 44. The Duke of Wellington's army at Waterloo consisted of 20,661 infantry, 8735 cavalry, 6877 artillery. There were also 33,413 allies. What was the whole number of his army? 45. The area of England is 50,535 square miles, of Scotland 29,167 square miles, and of Wales 8125 square miles. How many square miles in England, Scotland, and Wales together? 46. New Hampshire furnished 12,497 soldiers for the Revolution, Massachusetts 67,907, Rhode Island 5908, Connecticut 31,939. How many did these four states furnish? 47. A country merchant has in his store flour worth $656, sugar worth $480, molasses worth $325, cotton. cloth worth $125, tea worth $56, canned goods worth $78. What is the whole value of his goods? |