SPEED AND ACCURACY TESTS 4. Speed and Accuracy Tests. Group II 151 These tests are to help you further in learning to compute accurately and with speed. If, within the time limit, you fail to get the correct answers to all of the problems in a test, practice solving the problems in the set having the same number, then try the test again. Test No. 6. Subtract. Time limit, 1 minute. Practice No. 6. Practice subtracting, naming differences only. Test No. 8. Multiply. Time limit, 4 minutes. [With pencil.] Practice No. 8. Practice multiplying, thinking as few words as possible. Place each figure carefully. Test No. 9. Divide. Time limit after copying problems, 6 minutes. Three books were bought for $3.75. What was the average amount paid for each book? An average is found by making an equal division, or distribution, of a number. The average amount paid for each book was of $3.75, or $1.25. The books, however, might have been different prices: one might have been bought for $1.00, another for $2.00, and the other for $.75. [Without pencil.] 1. What is the average amount paid for each when 2 pictures are bought for $4.40? When 3 chairs are bought for $9.60? 2. Coal to supply a family for 3 months costs $39.00. Find the average cost per month. 3. A telephone contracted for at $30.00 a year costs on an average how much per month? II The charges on my gas bills for one summer were as follows: for June, $2.40; for July, $2.20; for August, $2.30. What was the average charge per month? $2.40 The three bills would all have been for the same amount, if 10¢ had been taken from the June bill and added to the July bill. The evened-up, or average, bill per month was, therefore, $2.30. To find such an average, it is customary to find the sum of the numbers to be averaged, and then to divide this sum by the total number of items included. 2.30 3 $6.90 $2.30 Average [With pencil.] 1. During a summer vacation, a boy earns, in the first month, $14.50; in the second month, $18.50. What were his average earnings per month? 2. A family pays for groceries: in September, $24.70; in October, $21.50; in November, $25.40. Find the average amount paid per month. 3. The bills covering a year's clothing for a family gave as a total for the father's clothing, $150; for the mother's clothing, $174; for the son's, $92.60; for the daughter's, $128.75. What was the average yearly cost per person for clothes? 4. A man's traveling expenses for six months were as follows: in January, $3.40; in February, $6.75; in March, $5.80; in April, $6.95; in May, $9.40; in June, $8.65. Find the average expense per month. 5. Solve three problems of your own in finding averages. *6. A year's expenses for a family of five are as follows: for food, $540; for rent, $350; for clothes, $245; for coal, wood, and gas, $120; for laundry, $65; for church, $40; for insurance, $130; for doctor's attendance, $10; for magazines, papers, and books, $24.50; for incidentals, $47.50. Find the average expense per month for each member of the family. Since the Great War boys and girls throughout the country are learning habits of thrift. What are some of the ways by which boys and girls in your part of the country can earn money? What are some of the best ways of saving money? [Use pencil only when needed.] 1. A southern girl raised 192 chickens valued at $264.24. The expense of raising the flock was $103.80. What was her net profit? 2. A New England boy with a small equipment made 60 pounds of maple sugar and 4 gallons of sirup. What was their value with maple sugar selling at 40% a pound and sirup a $2.75 a gallon? 3. A boy in the northwestern part of the country made a profit of $65 on a tenth of an acre of beans. He spent $16 of this money for clothes, $7 for rabbits, and $2 for amusement. The rest he gave to his father to help buy an automobile in which to go to school. How much did he give his father? 4. A girl in the southwestern part of the country got permission from her father to sell fruit to people passing in automobiles. In one day she sold 10 boxes of peaches at 35¢, 12 boxes of apricots at 45¢, and 5 boxes of plums at 60¢. How much money was taken? 155 |