15. A clerk spent $18 a month for board, $9 for a room, and $4,7 for clothes. How much did he spend in one month? 16. I sold of an acre of land to one man, 23 acres to another, and 15 acres to another. How many acres did I sell? 17. Find the perimeter of a sheet of paper 9 in. by 5 in. 5 5 7. Give answers to the following: 11-11-18 ; 11-11; 18-28%; 11-2%. 3 3 8. What do you notice about the denominators of the fractions you have subtracted in example 7? In subtraction of fractions, just as in subtraction of whole numbers, the minuend must be larger than the subtrahend. 9. When the denominators are alike, what do we subtract? 10. Could you subtract from without change? How may these fractions be made similar? 11. When the denominators are unlike, what is the first step? What is the second step? What is the third step? 12. If a boy buys papers at of a cent each, and sells them at 1 cent each, how much does he gain on each paper? 13. I bought a bushel of potatoes for of a dollar, and a bushel of corn for of a dollar. How much more did I pay for the potatoes than for the corn? 14. William bought a hat for $23, and a pair of shoes for $21. How much more did he pay for the hat than for the shoes? 15. A dealer sold eggs for $1017 which cost him $9. How much did he gain? 16. One farmer owns 12415 acres of land, and another owns 111- acres. How many more acres does the one 16 farmer own than the other? Subtracting fractions or mixed numbers that are not similar. Written Work Fractions must be made similar before they can be subtracted. 23. From a piece of cloth containing of a yard, † of a yard was sold. What part of a yard remained? 24. From a city lot containing was sold. of an acre, of an acre What part of an acre remained? 25. A man traveled of a mile the first hour, and of a 48. Albert had $2 and spent $ for skates. How much money had he remaining? 49. A vessel contained 8 gallons of oil. lon had leaked out, how much remained? After of a gal 50. A grocer who had bought 10 bushels of potatoes, sold of a bushel. How many bushels remained? 72. From a lot containing 17 acres, 5 acres were sold. How many acres remained? 73. If I paid $4 for a barrel of flour, and $23 for a barrel of potatoes, how much more per barrel did the flour cost than the potatoes? 74. A man bought two suits of clothes, one costing $354, and the other $281. How much more did the one suit cost than the other? 75. If a barrel of sugar costs $17 and a barrel of pork $81, how much more does the barrel of sugar cost than the barrel of pork? REVIEW 1. A newsboy earned $3 one day, $ another day, and $1 a third day. How much did he earn in the 3 days? 2. A stick was broken into two pieces-one 3 ft. long and the other 14 ft. long. How long was the whole stick?· 3. If a man earns $33 a day, and a boy $4 a day, how much more does the man earn in a day than the boy? |