This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ... cancellation. Find the products: 28. 8 x2 . 30. 8Jx4. 32. 6xl. 34. 2 x If 29. 6Jx3f 31. 7x2. 33. Ijx3f 35. 12J X If. 57. PRACTICAL USES OF CANCELLATION In solving problems it often is best to indicate the work, then use cancellation, as in the multiplication of fractions. 1. If 6 bu. of potatoes cost $4.50, how much ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ... cancellation. Find the products: 28. 8 x2 . 30. 8Jx4. 32. 6xl. 34. 2 x If 29. 6Jx3f 31. 7x2. 33. Ijx3f 35. 12J X If. 57. PRACTICAL USES OF CANCELLATION In solving problems it often is best to indicate the work, then use cancellation, as in the multiplication of fractions. 1. If 6 bu. of potatoes cost $4.50, how much will 20 bu. cost at the same rate? SOLUTION 10 1.50 Explanation.--Since 20 bu. will cost 20 -, g-n. fli-c of-what 6 bu. cost, then we multiply f 4.50 X V . pjff-ij 10. by First we cancel 2 frQm 2Q and 6) then a cancel 3 from 3 and $4.50. 1 2. If 8 bu. of apples cost $ 10.80, how much will 6 bu. cost at the same rate? Suggestion.-- x $10.80 =? 3. If grape fruit is selling at the rate of 6 for 40, how much will 9 cost? 4. When 21 bu. of seed wheat is needed for a 12-acre field, how much is needed for 32 acres at the same rate? 5. One spring Ralph got 513 eggs from a flock of 18 hens. At the same rate, how many should he expect from a flock of 10 hens? Pupils should be trained to express the relation of any two numbers, and to use this form of solution. In case they seem unable to do so, indicate the solution thus, 20 X ', reasoning that $4.50-5-6 gives the cost of 1 bu. and that 20 times the cost of 1 bu. is required. 6. Last year I used 14 tons of coal and my coal bill was $90. If I use but 12 tons this year, what will the bill be at the same rate? 7. If a 6-lb. roast costs $ 1.68, how much will a 9-lb. roast cost at the same rate? 8. When a 10-lb. ham costs $2.25, how much will a 16-lb. ham cost at the same rate? 9. When the meat and grocery bill for a family of 6 is $39 per months how much should it be for a family of 4 at the same rate? 10. The plates for a banquet of 18 people cost $22.50. How much would the cost h...
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