WRITTEN EXERCISES When the multiplier ends in 0 we write the multi- 24. plicand and the multiplier in this way: 1. Find the products: 10 2. At 40 ct. a dozen, what will 10 dozen oranges cost? 3. If a yard of ribbon costs $0.73, what will 20 yards of ribbon cost? 4. How many dimes are there in 48 dollars? 5. A bushel of corn weighs 56 lb. How many pounds do 30 bushels weigh? 6. There are 95 soldiers in a company and 10 companies in a regiment. How many soldiers are there in a regiment? 7. At $65 per acre, what is the value of a farm that contains 80 acres? 8. At 6 ct. a pound, what will be the cost of a barrel of sugar that contains 300 lb.? ORAL EXERCISES 1. Multiply by 10 each of these numbers: 2, 7, 4, 8, 6, 5, 9, 10, 12, 14. 2. Count by 11's from 0 to 110. Repeat the table of 11's. 3. Multiply by 11 each of these numbers: 2, 5, 3, 7, 6, 4, 8, 9, 10. Multiply 32 by 23. WRITTEN EXERCISES The multiplier is 23, which is equal to 20+ 3. To find the product of 32 and 23 we multiply 32 by 3 and by 20, 1. What will 75 barrels of apples cost at $3.25 per barrel ? 2. A fruit train of 19 cars was loaded with oranges. If there were 324 boxes in each car, how many boxes were in the whole train? 3. There are 231 cubic inches in a gallon. How many cubic inches are there in 28 gallons? 4. A dealer sold 28 lots at an average price of $366 per lot. How much did he receive for the lots? 5. What is the cost of 83 rods of fence at $0.47 a rod? 6. If a man spends $48 a year for cigars, how much will he spend for cigars in 25 years? 7. If a man earns $3.20 a day, how much will he earn in 28 days? 8. How many square feet are there in a lot 120 ft. long and 58 ft. wide? 9. If a ton of coal costs $6.75, what will 46 tons cost? DIVISION ORAL EXERCISES 1. Divide by 10 each of the following numbers: 20, 30, 40, 50, 60, 70, 80, 90, 110, 120, 140. 2. When a number ends in 0 it may be divided by 10 by canceling the 0; thus: 140 ÷ 10 = 14. 3. Divide these numbers by 10: 240, 320, 460, 270. 4. How many 20's in 40? in 60? in 80? Divide 420 by 20. 20)420 WRITTEN EXERCISES When both the divisor and the dividend end in 0 the division may be made shorter by cancellation. In this case we cancel the 0 of the 20 and the 0 of the 420, and then have to divide 42 by 2. 21 1. Divide by 2 each of these numbers: 4, 8, 10, 12, 16. 2. 2 is contained in 5 how many times? The remainder 1 is what part of 2? 5+2 = 21. 3. Divide each of these numbers by 2 and give the remainder as a fraction: 7, 9, 11, 13, 15, 17, 19. |