1. Name a number which is a multiple of 8 and 3. 2. If we wish to add or subtract eighths and thirds, to what shall we change them? 3. Name all the numbers of which 24 is a multiple. What fractions other than eighths and thirds can you add or subtract by changing them to 24ths? 7. }+1=? ¿−}= ? }+1⁄2=? }−4=? }+2=? ᄒ-ᄒ 24 24 Oral 1 5 8. ? 1. To what would you change ninths and halves if you wished to add or subtract them? 2. What other fractions than ninths and halves could be added or subtracted by making the same change? 3. What is the smallest number that exactly contains 2, 3, 6, and 9? 18 ? ? 18. +{=? {+}}= ? }+}}=? 7. 1+1=? 1}=? ¿+1=? j + 3 = ? } + { = ? 7.十ᄒ - = ᄒ? +1 = ? } -} = ? 3 + 8 = ? Oral REVIEW AND PRACTICE 1. What is the cost of 50 five-cent stamps? 8. How many days will a 12-gallon keg of water last 24 shipwrecked men if each man drinks a pint a day? 9. If Frances can knit 21 stitches a minute, how many stitches can she knit in half an hour? 10. The product of 20 and 16 is how much less than 20 times 20? 11. A silver dollar was given in payment for a chicken costing 78 cents and a pound of sausage at 19¢. What was the change? 12. Our schoolroom has a double floor. The upper part is of an inch thick and the part underneath is of ar inch thick. How thick is the entire floor? 13. Find the sums by adding the tens first: 56 + 24; 37 + 22; 59 + 26; 43 + 19. 14. Find the differences by subtracting the tens first: 46; 8528; 125 - 56. 81 – 32; 93 – 46; 85 15. How many cars will be needed to carry our school of 400 pupils to a picnic if each car carries 50? 16. A man receiving $21 a week was advanced to $33 a week. What was the advance per day? 17. Andrew took a $5 bill with which to pay the month's gas bill of $1.80. How much change should he bring back? 18. Let each pupil give a fraction problem to the next. Written 1. What must be added to $38.79 to make $341.81? 2. One factor of 14,319 is 37. What is the other? 3. The two factors of a number are 829 and 736. Find the number. 4. Add 17, 291, 16, and 7. 5. My speedometer registered started for a drive, and 1124 How many miles did I drive? 1098 miles when I miles when I returned. 6. Six girls share equally the cost of a picnic lunch. If the sandwiches cost 55¢, the fruit 40¢, the eggs 43¢, the cheese 16¢, the pickles 12¢, and the lemonade 20¢, what will be each girl's share of the cost? 7. A playground is 30 yd. square. How many feet does John travel in running around it four times? (Make a drawing.) 8. A man built a house, paying $397.65 for lumber, $125.50 for stone work, $57.60 for brick work, $147.25 for plastering, $66.85 for painting, $150.40 for labor, $31.75 for grading, and $41 for other expenses. What was the cost of the house? 9. Find the cost of the street lamps in one city block, if there are three lamps on each side and each lamp costs $75. 10. An automobile factory makes 327 automobiles a day. In how many days can it make 318,825 automobiles? 11. What profit does George make in four weeks if he sells 30 Posts a week at 5¢ a copy and 10 Journals at 15¢ a copy, when the Post costs 3¢ a copy and the Journal 11¢? 12. It takes one gallon of gasoline to run my automobile 20 miles. If the gasoline costs 23¢ a gallon, how much would it cost to run a distance of 120 miles? (120 is how many times 20?) 13. What is the value of 1021 acres of wheat land at $99 an acre? 14. What will it cost to travel 107 miles and return if the fare is 21 a mile? 15. How many years will it take a man to save $3528 if he saves $392 each year? (Notice that $3528 is almost $3600, and $392 is almost $400.) 16. A motor truck is built to carry 3000 pounds. How many barrels of salt, each weighing 280 pounds, could it carry safely? 17. An elevator car can carry safely 1300 pounds. The operator has admitted people weighing 112 lb., 152 lb., 148 lb., 205 lb., 195 lb., 103 lb., 175 lb., and 124 lb. Should he admit another weighing 200 lb.? 18. The admission fee to our school entertainment is 25 cents. How much shall we receive from 413 admissions? 19. If steel rails weigh 90 pounds for every foot of their length, how many feet of rails will a ton of steel make? 20. Wages at 45¢ an hour, 8 hours a day, 300 days in a year, amount to how much in a year? 21. 235160+ 405 + 816 + 783 = ? |