Dubbs' Complete mental arithmetic; a volume of carefully graded exercises adapted to the use of all schools - Softcover

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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. 1893 Excerpt: ... he had left, after which he had 80 turkeys. How many had he at first? 44. A merchant gained of his capital the first year, and f of that amount the second year. The third year he lost-£-of all his money, and found that he had $1200. What was his original capital? LESSON II. 1. Divide 92 into two parts, so that f-of the first--12, shall equal the second. Solution: The first part is f, the second is--12. The sum is of the first--12, which= 92. Then /-of the first= 92+12= 104. i=8, 1=64. f--12=28. Answer: 1st, 64; 2d, 28. 2. Divide 120 into two such parts, that f of the first--1 shall = the second. 3. Divide 100 into two parts, so that f of the first + 4 shall= the second. 4. Divide 140 into two parts, so that £ of the first + 5 shall = the second. 5. If to Mr. Smith's age you add its f and its f + 30 years, his age will be trebled. How old is he? 6. If I had as many dollars more, and $10 besides, I would have $70. How much money have I? 7. If I had f as many bushels more, and 3! bushels besides, I would have 49 bu. of corn. How much have I? 8. The sum of the ages of Alice and Robert is 41 years. Robert is twice as old as Alice--7 years. How old is each? I V / 130 COMPLETE MENTAL ARITHMETIC. g. The sum of the ages of Mary and Frank is 38 yr. Mary is twice as old as Frank-f 2 yr. How old is each? 10. Albert is twice as old as Oliver + 9 yr. If their united ages= 39 yr., how old is each? u. Agnes is 3 times as old as Maggie--8 yr., and the difference of their ages is 12 yr. How old is each? 12. If $12 be added to £ of A's money, the sum will = B's. Together they have $100. How much has each? 13. If $12 be subtracted from £ of A's money, the remainder will= B's. Together they have $87. How much has each? 14. If f of a farmer's sheep were incr...

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