Commercial Arithmetic |
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Page 2
... Example . 83561 × 37 . = Ans . 3091757 . Mental Process 7x1 = 17 7 × 6 = 42 + 3x1 = 45 4 + 7x5 = 39 + 3 × 6 = 57 5 + ... EXAMPLES . 1. 65372489 by 73 , 45 , 84 . 3 . 5030512 by 47 , 39 , 26 . 5. 4123874 by 85 , 123 , 304 . 3 . Involution ...
... Example . 83561 × 37 . = Ans . 3091757 . Mental Process 7x1 = 17 7 × 6 = 42 + 3x1 = 45 4 + 7x5 = 39 + 3 × 6 = 57 5 + ... EXAMPLES . 1. 65372489 by 73 , 45 , 84 . 3 . 5030512 by 47 , 39 , 26 . 5. 4123874 by 85 , 123 , 304 . 3 . Involution ...
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... Example 1. 8657 × 103 . 865700 25971 891671 Example 2. 753106 × 3105 . 75310600 2259318 3765530 2338394130 2. Factors among the digits should be constantly noticed and made use of to shorten the number of lines or lessen the multipliers ...
... Example 1. 8657 × 103 . 865700 25971 891671 Example 2. 753106 × 3105 . 75310600 2259318 3765530 2338394130 2. Factors among the digits should be constantly noticed and made use of to shorten the number of lines or lessen the multipliers ...
Page 5
... Example . 7983204-1875 . 1875 7983204 | 4257 4832 10820 14454 1329 rem . Thus practically the figure necessary to make up the figure above it is put down and the resulting tens - figure is added to the next multi- plication . Process ...
... Example . 7983204-1875 . 1875 7983204 | 4257 4832 10820 14454 1329 rem . Thus practically the figure necessary to make up the figure above it is put down and the resulting tens - figure is added to the next multi- plication . Process ...
Page 6
Samuel Jackson. Example 1. £ 891 . 11s . 4d . ÷ 73 . £ . 8. d . Example 2. 361 days 11 hrs . 36 mins . ÷ 81 . d . h . m . I 73 891 11 4 £ 12 . 81 361 11 36 4 d . 161 37 15 24 20 899 11 h . 311 4s . 89 19 8 12 60 232 4d . 516 6 m . 40 30 ...
Samuel Jackson. Example 1. £ 891 . 11s . 4d . ÷ 73 . £ . 8. d . Example 2. 361 days 11 hrs . 36 mins . ÷ 81 . d . h . m . I 73 891 11 4 £ 12 . 81 361 11 36 4 d . 161 37 15 24 20 899 11 h . 311 4s . 89 19 8 12 60 232 4d . 516 6 m . 40 30 ...
Page 9
... Example 2. £ 17 . 11s . 3gd . = £ 17.565 . 735 Mental process 5 × 11 = 55 4 x 32 + 0 ( below 6d . ) = 15 Example 3. £ 86 . 19s . 14d . = 86 · 9 | 5′52083 . Mental process 19 x 5 = ⚫9 ( 5 ) Add 1 × 4955 4x5 = 20 + 2 = 22 = 9552 4x5 = 20 ...
... Example 2. £ 17 . 11s . 3gd . = £ 17.565 . 735 Mental process 5 × 11 = 55 4 x 32 + 0 ( below 6d . ) = 15 Example 3. £ 86 . 19s . 14d . = 86 · 9 | 5′52083 . Mental process 19 x 5 = ⚫9 ( 5 ) Add 1 × 4955 4x5 = 20 + 2 = 22 = 9552 4x5 = 20 ...
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Common terms and phrases
A. W. VERRALL aliquot Aliquotise Amsterdam annuity arbitrated assay Austrian florins Avoirdupois Bank Bar silver bills of exchange Brokerage 1 p.m. bullion bushels calculated carats cash balance centesimos centimes cents cheques College compound amount Course of Exchange currency cwts debt decametre decimal Decimalise Direct rates discount Divide dollar dwts endorsed English Example farthings Fcap Find price Fixed number florins fraction francs gallon galls given price gold coins grains grammes GREEK Hamburg hectolitres inches interest kilog kilogramme LATIN legal tender Lisbon litres London M.A. BOOK metre metric system millièmes milreis mils Multiply Note number of places Paris payment pence pesetas peso piastres places required correct premium Price per lb Prof Professor profit quoted rate of exchange remittances Rule rupee selling sight sold stamp sterling tael Troy Weights and Measures zero date
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