The Art of Computation, Designed to Teach Practical Methods of Reckoning, with Accuracy and RapidityD. W. Goodrich, 1873 - 206 páginas |
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Página 3
... and surest . Instead of drilling the pupil upon these operations till the most difficult problems are as easy to him as his alphabet , they give him a score of examples to do in the most elementary manner , and then ...
... and surest . Instead of drilling the pupil upon these operations till the most difficult problems are as easy to him as his alphabet , they give him a score of examples to do in the most elementary manner , and then ...
Página 7
... problem , but by a very different method . He would say 1675 325 544375 3 × 75 = 225 ; + 25 × 16 = 25 ; + 3 × 165426 ; + 25 × 75 = 544375 a method requiring no retention of large numbers , and dependent upon a few simple rules of ...
... problem , but by a very different method . He would say 1675 325 544375 3 × 75 = 225 ; + 25 × 16 = 25 ; + 3 × 165426 ; + 25 × 75 = 544375 a method requiring no retention of large numbers , and dependent upon a few simple rules of ...
Página 11
... parenthe- sis ) . To show more fully how these principles are applied , as well as to afford practice for the pupil , problems are added with full solutions . 1. What cost 32 tons of hay at $ 21 PREFACE TO THIRD EDITION . 11.
... parenthe- sis ) . To show more fully how these principles are applied , as well as to afford practice for the pupil , problems are added with full solutions . 1. What cost 32 tons of hay at $ 21 PREFACE TO THIRD EDITION . 11.
Página 27
... problem would be worked thus : Seven and five are twelve , and 7 one are thirteen , and two are fifteen , and four are nineteen , and six are twenty - five , and eight are thirty - three , and nine are forty - two , and three are forty ...
... problem would be worked thus : Seven and five are twelve , and 7 one are thirteen , and two are fifteen , and four are nineteen , and six are twenty - five , and eight are thirty - three , and nine are forty - two , and three are forty ...
Página 28
... tens or 40 , making 63 . Take the same problem and add by sec- tions of less than 30. 4 + 6 + 5 + 8 + 3 = 26 . 9 + 2 + 7 + 6 = 24 . 8 + 5 = 13 . Now 13 + 4 + 663 , as before . In adding long columns , this method will be found 28 ADDITION .
... tens or 40 , making 63 . Take the same problem and add by sec- tions of less than 30. 4 + 6 + 5 + 8 + 3 = 26 . 9 + 2 + 7 + 6 = 24 . 8 + 5 = 13 . Now 13 + 4 + 663 , as before . In adding long columns , this method will be found 28 ADDITION .
Otras ediciones - Ver todas
The Art of Computation: Designed to Teach Practical Methods of Reckoning ... David White Goodrich Sin vista previa disponible - 2016 |
The Art of Computation: Designed to Teach Practical Methods of Reckoning ... David White Goodrich Sin vista previa disponible - 2009 |
Términos y frases comunes
added amount appended Avoirdupois bought breadth bushels calculation Capricornus cent chlorine ciphers columns combinations contain copper cube cube root cubic foot decimal point denominator Diam diameter difference digits dimensions divide divisible divisor dollar DRY MEASURE equal estimated example exceeds factors five four fractions gallons gals give gold half heap Hence hundred inches inclined plane interest July last figure least common multiple length measure method metre Metric System minuend months multiply nine number of bricks number of days ounces payment pound principal problems pupil quotient reckon remainder right hand figures rods root Sept shillings side silver specific gravity square subtract subtrahend Suppose tens and units thick thousand TROY WEIGHT unit figure United States Rule wall weight whole numbers yards
Pasajes populares
Página 50 - ... the square of the second. _ Again, (a — by = (a — 5) (a — 5) = a2 — 2a6 + 52. (2) That is, The square of the difference of two quantities is equal to the square of the first, minus twice the product of the first by the second, plus the square of the second.
Página 141 - WORK. BRICKWORK is estimated at the rate of a brick and a half thick. So that if a wall be more or less than this standard thickness, it must be reduced to it, as follows : Multiply the superficial content of the wall by the number of half bricks in the thickness, and divide the product by 3. The...
Página 75 - Multiply each numerator into all the denominators except its own for a new numerator, and all the denominators together for a common denominator.
Página 192 - ... and directed that the remainder be given in farms of precisely the same shape and size to his four sons. Required the shape and size of each ? 9. Supposing there are more persons in the world than any one of them has hairs on his head, it then follows as a necessary consequence, that some two of them at least, must have exactly the same number of hairs on their heads, to a hair : required the proof.
Página 171 - These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Página 133 - Multiply the amount of the smaller side by the number of days between the two average dates, and divide the product by the balance of the account. The quotient will be the time...
Página 175 - A afterwards took 60 alone, which he sold as before at 5 for $2, and received but $24 : what became of the other dollar ? This is rather a catch question, the insinuation that the first lot were sold at the rate of 5 for $2, being only true in part. They commence selling at that rate, but after making ten sales, A's pigs are exhausted, and they have received $20 ; B still has 10 which he sells at
Página 18 - The greatest common divisor of two or more numbers, is the greatest number which will divide them without a remainder. Thus 6 is the greatest common divisor of 12, 18, 24, and 30.
Página 129 - Multiply each payment by its term of credit, and divide the sum of the products by the sum of the payments ; the quotient will be the average term of credit.
Página 185 - ... water side a boat which can carry but two persons at once, and for want of a waterman, they are necessitated to row themselves over the river at several times : The question is, how those...