10. How many are 90 thousand and 10 thousand ? 11. One hundred thousand is expressed thus : 100,000. LESSON LXVII. 1. Copy and read the following: 100,000 120,000 562,000 159,725 540,805 723,016 986,784 684,379 2. What do the three figures at the right represent? Units, tens, and hundreds. 3. What do the three figures at the left represent? Units, tens, and hundreds of thousands. 4. A group of figures containing the units, tens, and hundreds of any denomination is called a Period. 5. How many periods are there in the number 132,654? 6. What is the denomination of the first period ? 7. What is the denomination of the second period ? 8. Copy and read the following: 639,955 423,872 82,675 400,800 264,361 315,008 845,762 8,005 9. How many figures must there be in a period ? 10. How are the periods separated from each other? Express in figures the following: 11. Two hundred eight thousand, five hundred seventy-four. 12. Seven hundred fifty-four thousand, two hundred twenty-five. 13. Eight hundred sixty-three thousand, four hundred eighty-nine. 14. Eight hundred sixty-five thousand, three hundred thirty-seven. 15. Eighty-four thousand, five hundred eighty-four. 16. Nine hundred thirty-three thousand, six hundred twelve. 17. Three hundred thousand, six hundred. 18. Eight hundred ninety-four thousand, six hundred twenty-four. 19. Five hundred eighty thousand, seven hundred ninety-seven. 20. Three hundred eighty-nine thousand, seven hundred eighty-one. 21. Seven hundred eighteen thousand, nine hundred eighty-seven. 22. Six hundred thousand, one. 23. Six hundred twenty-four thousand, three hundred twenty-nine. 24. Eight hundred thirty-nine thousand, five hundred sixteen. 25. Nine hundred, thirty-five thousand, eight hundred twenty-six. 26. Nine hundred sixty-eight thousand, nine hundred thirty-seven. 1. Helen solved 6 examples, Martha solved 5, and Jennie solved 9. How many examples did they all solve ? 2. How many goblets are 3 goblets, 8 goblets, and 9 goblets ? 3. James learned 5 lessons on Monday, 6 lessons on Tuesday, and 3 lessons on Wednesday. How many lessons did he learn in the three days? 4. How many marbles are 5 marbles, 4 marbles, 6 marbles, and 2 marbles ? 5. After spending 2 cents for a slate-pencil and 5 cents for a lead-pencil, James had 5 cents left. How much had he at first ? 6. How many dollars are 10 dollars and 8 dollars ? DEFINITIONS. The process of finding one number that is equal to two or more numbers is called Addition. The result in addition is called the Sum. The Sign of Addition is an upright cross: +, called plus. The Sign of Equality is two short horizontal lines: =. PROCESS. 1. What is the sum of 5, 4, 7, and 6 ? EXPLANATION. -For convenience the numbers 5 to be added are arranged so that they stand in a column. 4 We begin at the bottom to add, thus: 6, 13, 7 17, 22, and write the sum beneath. 6 Hence, the sum is 22. In adding say 6, 13, 17, 22, instead of 6 and 7 22 are 13 and 4 are 17 and 5 are 22. 7. William shot 6 squirrels, Henry shot 8, John shot 5, and James shot 7. How many squirrels did they shoot? 8. Oscar owned 4 cows, Herbert owned 5, George owned 3, and Clarence owned 6. How many cows did the four boys own? 9. A merchant received 5 boxes of oranges one day, 6 the next, and 4 the next. How many boxes of oranges did he receive? 10. A farmer sold 6 cords of wood to one man, 3 cords to another, 8 to another, and 2 to another. How many cords of wood did he sell? SLATE EXERCISES. Copy and add the following: 3 6 9 2 6 2 (14.) 4 7 2 3 5 4 (15.) 6 2 3 9 3 2 LESSON LXIX. PROCESS. 1. What is the sum of 217, 853, and 365 ? EXPLANATION.–For convenience the num217 bers to be added are arranged so that units stand under units, and tens under tens, etc. 853 Beginning at the right hand, each column 3 6 5 is added separately. 1435 Thus, 5+3+7=15, the sum of the units. 15 units are equal to 1 ten and 5 units. The 5 is written under the column of units, and the 1 is reserved to add with the tens. 1 reserved +6 +5+1=13, the sum of the tens. 13 tens are equal to 1 hundred and 3 tens. The 3 is written under the column of tens, and the 1 is reserved to add to the column of hundreds. 1 reserved +3+8+2=14, the sum of the hundreds. 14 hundreds are equal to 1 thousand and 4 hundreds, which are written in thousands' and hundreds' places in the sum. In adding, name results only. Thus, instead of saying, 5 and 3 are 8 and 7 are 15, say 5, 8, 15. |