Test No. 2. Subtraction. Practice on each set of nine problems until you can write the correct answers in 20 seconds. Think differences only. In taking 9 from 17, think 8, not 9 from 17 is 8. II. ACCURACY IN LONGER PROBLEMS 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. 4. Subtract. Time limit, 1 minute. 1 Pupils failing on a particular type of problem may practice upon it by working the problems in the column that contains it. Practice No. 5. Practice adding. Work rapidly, but at the same Try, within a limit of 5 minutes, to make a score of 100 points on this exercise. The number of points to be counted for each correct answer is given in parenthesis below the letter of the problem. [Write answers on the folds of a paper.] Add: 1. Why, in solving the first problem above, was it necessary to multiply one number by the other? Why, in solving the second problem, was it necessary to divide? 2. Name the terms used in multiplication. Which term is the number that is taken a given number of times? Which shows how many times the number is to be taken? Which shows the result? 3. Name the terms used in division. Which term is the number that is divided? Which is the number by which the division is made? Which is the answer? 4. When a division comes out uneven, the number left from the last subtraction is called a remainder. Above what number is a remainder written in the quotient? 5. In multiplication, a product is usually tested by multiplying a second time. What test is used in division? Find how much is due a workman: 6. For 8 hours of work at 65¢ an hour. 7. For 9 hours of work at 45¢ an hour. 8. For 5 hours of work at 85¢ an hour. 9. For 4 days of work at $6.50 a day. 10. For 21 days of work at $7.20 a day. 11. For 5 weeks of work at $33.50 a week. [With pencil.] 12. How much is earned an hour by a man working 8 hours for $3.60? By a man working 7 hours for $5.25? By a man working 8 hours for $6.00? 13. How much more is earned a day by a man working 6 days for $45 than by a man working 6 days for $32.40? 1 14. A skilled workman earns $45 a week; an unskilled workman, $30 a week. The difference in their earnings amounts to how much in a year of 52 weeks? 15. Find the difference in a year's wages earned by a man receiving $65 a week and those of a man receiving $40 a week. *16. How much more is earned per hour by a man working 40 hours a week for $35 a week than by a man working 48 hours for $30.80? 1 THE SOLUTION OF PROBLEMS: In solving problems containing two or more steps, the pupils should form the habit of thinking through each problem before beginning to compute. The following directions will prove helpful: 1. Find what the problem calls for. 2. Explain how to find the answer required. |