50. Add 92, 924, 9857, 95064, and 572. 51. Add 8, 28, 348, 4578, 90068, and 8. 52. Add 7, 77, 777, 7777, 7777, 777, and 77. = ? 53. Add 66666, 6666, 666, 66, 6, 66, 666, and 6666. 57. 864209+753186 +999999+888888 = ? 61. A merchant paid $15796 for a lot and built a house upon it, which cost him $25650. How much did the lot and building cost? Ans. $41446. 62. A man gave $2375 to his son, $1875 to his daughter, and donated $10984 to charitable purposes. he give away? How much did Ans. $15234. 63. By selling a house and lot for $25875 I lost $987. What did both cost? Ans. $26862. 64. A coal dealer shipped from Pittsburgh at one time 225675 bushels of coal; at another time 186798 bushels; at another time 75987 bushels. How many bushels did he ship in all? Ans. 488460. 65. In 1870 the population of North America was 50,931,242, South America 26,677,419, Central America 2,690,635, and West Indies 4,065,945. united population? What was their Ans. 84,365,241. SECTION IV. SUBTRACTION 67. Subtraction is the process of taking one number from another. The Terms used in Subtraction are Minuend, Subtrahend, and Difference, or Remainder. 68. The Minuend is that number from which the other is to be taken. 69. The Subtrahend is that number which is to be taken from the other. 70. The Difference, or Remainder, is the result obtained by Subtraction. 71. The Sign of Subtraction is a short horizontal line called minus (-), and when placed between two numbers signifies that the one after it is to be taken from the one before it. Thus, 5 2 means that 2 is to be taken from 5, and is read "5 minus 2." The term minus, Latin, means less, or diminished by. Illustration.-In the expression 5-2=3, read 5 minus 2 equals 3, 5 is the minuend, 2 the subtrahend, and 3 the difference, or remainder. Oral Exercises + EXAMPLE. James had 9 apples and gave his brother 4. How many had he left? SOLUTION. Since 4 apples from 9 apples leave 5 apples, he had 5 apples left. Or, 4 apples from 9 apples leave 5 apples. Therefore, he had 5 apples left. Or, He had 5 apples left, because 4 apples from 9 apples leave 5 apples. PROBLEMS. 1. There are 10 books on the shelf. If I take away 8, how many will be left? Take 8 from 10 and how many are left? 5 from 8? 6 from 8? 1 from 10? 4 from 6? 6 from 7? 7 from 9? 3 from 10? 2. Susan has 9 cents and Mary has 6. How many more has Susan than Mary? How many less has Mary than Susan. 9 less 6 are how many? 9 less 5? 9 less 4? 9 less 3? 9 less 2? 9 less 1? 9 less 9? How many are 3. 15 horses less 6 horses? 8. 17 cents less 8 cents? 10. 15 marbles less 8 marbles? 11. 15 books less 9 books? 19. If you take 7 dollars from 14 dollars, how many remain ? |