Beecham's help to scholars : containing arithmetical tables and signs, weights and measures, tables of the metric system, geographical and geometrical definitions, sol-fa modulator, and other useful information arranged progressively / Beecham's Pills, Ltd.

Date:
[1929?]
Catalogue details

Licence: Public Domain Mark

Credit: Beecham's help to scholars : containing arithmetical tables and signs, weights and measures, tables of the metric system, geographical and geometrical definitions, sol-fa modulator, and other useful information arranged progressively / Beecham's Pills, Ltd. Source: Wellcome Collection.

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    RAPID DECIMALISATION OF MONEY. To decimalise 18s. 44d. proceed as follows:—{a) Bring the pence and halfpence (or farthings, if there are any) to farthings. 44 x 4 = 18. Put down 8 and carry 1. (6) Multiply the shillings by 5 and add the number to be carried. 18 x 5 = 90 and | carried = 9]. The answer is 0°918. Let us work another example and remember that if the number of pence in the question is 6 or more we must add another | to the farthings total. ExampLe: Decimalise 15s. 8d. 82 x 4 = 35. Now add | because the amount being dealt with is 6d. or over. 35 + | = 36. Put down 6 and carry 3. 15 x 5=75 and 3 carried gives 78. The answer is 0°786. The reverse operation is guite simple. Change °*786 to shillings, pence, ete. (a) Divide the first two decimal figures by 5, which gives 15 and 3 over. Cail the 15, shillings and treat the 36 as farthings (remembering to deduct 1 if the number is over 24, the number of farthings in sixpence). 36 — | = 35 farthings = 83d. Answer, 15s. 83d. Remember that | = ‘25,4 = '5 and? ='75. As it is generally necessary to go to 5 decimal places in order to obtain correct results we will now extend the examples given previously. Exampte A. 18s. 44d. = °918, 45 = 4°5. Divide this by 6, which gives 75 and place these figures after the answer given above, thus: 18s. 44d. = °91875 ExampLe B. 15s. 83d. = °786. In this case we have already added an extra | since the pence column is over 6d., so take 6d. off the amount, 8 — 6 = 23 = 2:75. Dividing by 6 as before gives 458. Hence 15s. 83d. = *786458. (Five decimal places are generally sufficient.) Application of the Method. To find the cost of 1,000 articles at £1 17s. 74d. each: £1 17s. 74d. = £1°880208. £1°880208 x 1000 = £1880°208 = £1880 4s. 2d. answer.
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