7. Chester put in his barn an electric bell to be rung from the house. The bell cost $3, the wire $1, the battery, and the button $1. How much did he pay for materials? 8. Last year Mr. Stone used 5 cords of wood, and this year 11⁄2 cords more. How many cords this year? How many cords in both years? SUBTRACTION OF FRACTIONS 1. Take from: 1 10 11 14 11 3 2 10 12 12 2 3 35 4967 6. Subtract Oral Express and as similar fractions. } – }} = 30; = 15. To subtract fractions, change the fractions to equivalent fractions having a common denominator, and write the dif ference of the numerators over the common denominator. SUBTRACTION OF MIXED NUMBERS 1. Subtract 35 from 8. Written and § and 3. Since cannot be taken from 3, we take 1 from the 8, express it as 88, and add it to the, making 38-35, or 15. = 4. 121 - 31 = 7. 171-51 9. 48-21 10. 1215-68 17. Which is the shorter distance, & of a mile or of a mile? How much shorter ? 18. What must be taken from 4 to leave 2? 19. What must be added to 5 to make 128? 20. $12 is how much more than $84? 21. Change and to lowest terms and find their difference. 1. After selling of a farm, what part is left? 2. Ralph picked ğ of a peck of cherries. He sold of a peck. What part of a peck had he then? 3. Isabel had $4. She bought a belt for $1 What part of a dollar had she left? 4. What part of a dollar did John lose by selling for $1 a knife which cost $? 5. Roy earned $11 and spent $1. What part of a dollar had he left? 6. One half of Mr. Arbin's land is a vegetable garden, is a flower garden, and the rest is in lawn. What part in lawn? 7. After selling of a bushel and of a bushel, what is left of a barrel of apples (2) bu.)? 8. Gladys is 121 years old, and her sister is 21 years younger. What is the sister's age? 9. One fourth of a farm is in pasture, in grass, and the rest in grain. What part in grain? 10. Harry earned $3 a week for 5 weeks. bought a suit for $123. How much had he left? He then Oral or Written D = ? = 1 2. 2. 9. 10. +?=11?+ 8+ ? = 2 ?+ =1 - = = 2-?-14? 2=1 } + ? = 1} | ? + 24 = 31|11 — ? = 2}+?=51 ? +51 = 61 31 - ? = 11 18+ ?= 25 ? +1=223-?=1}|? - 2}=1} 18+ ?=31 ? +15=2133 ? = 21? - 33 = 21 1. A kerosene can holds 5 gallons. How much is left after 1 gallons have been drawn? 2. Mrs. Emerson paid $ for eggs and $ for sugar. How much for both? 3. A man's step is 25 feet, and his son's 1 feet. How much longer than the son's step is the father's? 4. A carpenter has a board 12 feet long with which to cover a space 10 feet long. How much must he cut off? 5. Albert spent of his money for a ball and of it for a bat. What part of his money had he left? How much had he left if he had 60 cents at first? The tub 6. A tub of butter weighs 56 pounds. weighs 3 pounds. What is the weight of the butter? 7. A man can saw boy can saw of it. of a pile of wood in a day, and a What part can both saw in a day? 8. In a storm at sea, of a cargo of fruit was thrown overboard and was spoiled. What part of the cargo was lost? What part was saved? 9. What is the perimeter of an envelope 6 inches long and 34 inches wide? 10. A seam of an inch wide is made on both sides of a strip of cloth 27 inches wide. What is the width of the strip after the seams are made? 11. A bat cost $, a ball $, and a pair of ball shoes $14. What was the change from a $ 5-bill? 12. From a piece of dress goods containing 60 yards there were sold 12 yards, 8 yards, 117 yards, and 19 yards. How many yards were left? 13. Spice bought at 273 cents a pound is sold at 42 cents a pound. What is the gain? To multiply a fraction by a fraction, write the product of the numerators over the product of the denominators, canceling when possible. This rule applies to all cases of multiplication in fractions, for every whole number may be written as a fraction with I for its denominator. x 15 may be written × 15; |