A New System of Mental Arithmetic ...Author, and published, 1837 - 173 σελίδες |
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Σελίδα
... reader has acquired the rudiments of this branch of science , the author has not gone over the ground traversed by others , but has been anxious to carry the student still farther , to open to him new vistas , and to qualify him for the ...
... reader has acquired the rudiments of this branch of science , the author has not gone over the ground traversed by others , but has been anxious to carry the student still farther , to open to him new vistas , and to qualify him for the ...
Σελίδα 1
... reader's best attention , is a ready knowledge in reducing them to their lowest terms ; indeed , so necessary is this acquirement , that a real knowledge of mental calculation cannot be obtained without it . The following examples will ...
... reader's best attention , is a ready knowledge in reducing them to their lowest terms ; indeed , so necessary is this acquirement , that a real knowledge of mental calculation cannot be obtained without it . The following examples will ...
Σελίδα 3
... reader may see how the products are inverted at equal distances ; for 9 times 1 is 9 , or 09 ; and 9 times 10 is 90 ; again , 9 times 2 is 18 ; and 9 times 9 is 81 ; so that by com- paring each product at equal distances , the figures ...
... reader may see how the products are inverted at equal distances ; for 9 times 1 is 9 , or 09 ; and 9 times 10 is 90 ; again , 9 times 2 is 18 ; and 9 times 9 is 81 ; so that by com- paring each product at equal distances , the figures ...
Σελίδα 4
... reader have a ready knowledge of the enlarged mul- tiplication table , it may easily be done in one line . EXAMPLE . 18 ) 47502 2639 8. Any number ending with 5 or a cipher , the sum of whose digits is divisible by 3 , can be divided by ...
... reader have a ready knowledge of the enlarged mul- tiplication table , it may easily be done in one line . EXAMPLE . 18 ) 47502 2639 8. Any number ending with 5 or a cipher , the sum of whose digits is divisible by 3 , can be divided by ...
Σελίδα 5
... cube root . ) I have merely mentioned these things here , to lead the reader to observe them as he proceeds . ending differently to what has been before stated , and B 3 5 See how many times the number 25 is contained in ...
... cube root . ) I have merely mentioned these things here , to lead the reader to observe them as he proceeds . ending differently to what has been before stated , and B 3 5 See how many times the number 25 is contained in ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
12 per cent acres aliquot annexed annum answered mentally barley corns brought to farthings ciphers compound interest consequently cost price cube root deducted denominator difference dividend DIVISIONAL PROCESSES divisor doubling the right drams dwts ell English equal figure and fraction find the product find the value gain per cent gallons given number grains highest number hundreds last right hand left hand figure lowest terms mental calculation minutes multiplicand Multiply the given namely number of digits number of farthings number of figures number of months number of pounds number of shillings numeration table observe the following ounces pounds sterling principal put proceed put to interest quantity quotient rate per cent reader reduce remainder right hand figure selling price shews shillings and pence subtract Suppose tenpences three figures three left hand three right hand tons troy vulgar fraction weeks whole number yard cost yards of cloth
Δημοφιλή αποσπάσματα
Σελίδα 161 - Time, in advance, behind him hides his wings, And seems to creep, decrepit with his age ; Behold him, when past by ; what then is seen, But his broad pinions swifter than the winds ? And all mankind, in contradiction strong, Rueful, aghast ! cry out on his career.
Σελίδα 21 - Divide the numerator of the dividend by the numerator of the divisor.
Σελίδα 135 - If the price be an even number of shillings under 20 — multiply the quantity by half the number, doubling the first figure of the product for shillings, and the rest will be pounds.
Σελίδα 1 - ... and is called the denominator. The number above the line is called the numerator, because by it we enumerate, or express the number of parts taken.
Σελίδα 18 - Hence the BANK RULE. Multiply the principal by the number of days, and divide by 6000 ; the quotient will be the interest at 6 per cent. For any other rate than 6 per cent., compute the interest in the same manner, and add or subtract such part as may be required. For 4 per cent. subtract j ; for 4i per cent. subtract J ; for 5 per cent. subtract J ; for 7 per cent. add...
Σελίδα 153 - How often will the wheel of a coach, that is 17 feet in circumference, turn in 100 miles? Ans.
Σελίδα 31 - Cambric, which cost me 90/ but some Damage having happened to it, I am willing to lose...
Σελίδα 12 - RULE. Reduce the given Quantity to the lowest Name mentioned, for a Numerator ; under which put the Number of those Parts contained in an Unit of the Integer for a Denominator, then reduce the Fraaion to its lowest Terms.
Σελίδα 32 - If § of a yard cost § of a £, what will J of a yard cost? A
Σελίδα 55 - ... the amount, from which subtract the principal and the remainder will be the compound interest.