146. What is the extent of the British Isles, if Scotland has 30,000 square miles, England 51,200, Wales 7,200, and Ireland 32,500 ? QUESTIONS. 32. What are like numbers? 33. What is addition? 34. What is the sum of two or more numbers? 35. What is the sign of addition? 36. The sign of equality? 37. The dollar sign? 38. Give a principle of addition ? 39. In expressing currency of the United States in figures, what decimal places may cents occupy? What decimal place do mills occupy ? 40. How are numbers written for adding? How are they added? 41. What is the proof of addition? 42. 1. If John should catch 6 trout and Arthur 4, how many more will John have than Arthur? 2. 4 and how many are 6? How many are 6 less 4? 3. John has been angling 5 hours and Arthur 3. How many more hours has John been angling than Arthur? 4. John sold a trout for 6 cents, and another for 3 cents. How much more did he get for the one than for the other? 5. 5 less 3 are how many? 6 less 3 are how many? 6. Jane had 8 peaches and gave away 4. How many had she left? 7. 9 books less 6 books are how many books? 8. 8 less 3 are how many? 9 less 6 are how many ? 9. If you take $4 from $7, how many dollars will be left? 10. Upon a tree there were 8 birds, but 5 have flown away. How many remain? 5 and how many are 8 ? 11. How many are 7 less 4? 8 less 5? 12. A man earned in a week $9, and spent for board 6. How many dollars had he then left? 13. What is a unit of $9? A unit of $6? Why then are $9 and $6 like numbers? $6 and how many dollars are $9? 43. Subtraction is taking one of two like numbers from the other. 44. The Subtrahend is the number subtracted. 45. The Minuend is the number from which the subtrahend is taken. 46. The Difference or Remainder is the result of a subtraction. 47. The Sign of Subtraction is. Its name is minus, which means less. Thus, 8-62 is read 8 less 6 are 2. Copy and complete the following: 23. 685 ? 7-5+9=? 9-6+10=? 9+3-7=? 11+5-9=? 24. 1837 ? 25. 87-9+3-7=? 11+2 6+5−2 = ? 26. 125+7-3=? 15+ 5-9-3+8=? 27. Subtract 9 from 13. 2 from 11. 7 from 12. 28. Subtract 6 from 8. 8 from 9. 4 from 4. 29. Subtract 1 from 7. 5 from 17. 9 from 16. 30. Subtract 7 from 15. 9 from 18. 31. Subtract by 2's from 24 back to 0. 4 from 13. - 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0. 48. A Principle of Subtraction. The sum of the subtrahend and the difference is equal to the minuend. WRITTEN EXERCISES. 42. Subtract 325 from 958. Minuend, 958. Proof, Solution. For convenience we write the subtrahend under the minuend, so that figures of the same order are in the same column. 5 ones from 8 ones leave 3 ones, which we write beneath in ones' |