Mental Arithmetic SimplifiedT. Brooke and Company, 1838 - 48 σελίδες |
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Σελίδα 7
... divide it into an equal number of parts , and com- pare it with other lines of the same length , yet divided into different proportions , something like the following : - 4ths 8ths 16ths 3ds 6ths 9ths 12ths 12 or 1 or for 12 for 1 or 3 ...
... divide it into an equal number of parts , and com- pare it with other lines of the same length , yet divided into different proportions , something like the following : - 4ths 8ths 16ths 3ds 6ths 9ths 12ths 12 or 1 or for 12 for 1 or 3 ...
Σελίδα 8
... equal how many equal how many 5ths of 20 ? Solution : 3 of 12 = 8 ; of 24 equal how many 10ths of 20 ? of 16 19. - Reduction . - The numerator and denominator of a fraction ... dividing the numerator by the denominator ; as 3543 . 21. - To ...
... equal how many equal how many 5ths of 20 ? Solution : 3 of 12 = 8 ; of 24 equal how many 10ths of 20 ? of 16 19. - Reduction . - The numerator and denominator of a fraction ... dividing the numerator by the denominator ; as 3543 . 21. - To ...
Σελίδα 9
... divide it into an equal number of parts , and com- pare it with other lines of the same length , yet divided into different proportions , something like the following : - 4ths 8ths 16ths 3ds 6ths 9ths 12ths 12 or 11⁄2 or its or f 12 for ...
... divide it into an equal number of parts , and com- pare it with other lines of the same length , yet divided into different proportions , something like the following : - 4ths 8ths 16ths 3ds 6ths 9ths 12ths 12 or 11⁄2 or its or f 12 for ...
Σελίδα 11
... Divide first when you can . Divide 9 by ; 12 by † ; 16 by ; 20 by 3 . Of the fractional parts of a pound and a shilling OF A POUND . S. d . OF A SHILLING . d . is equal to 10 0 5 0 15 0 6 8 13 4 3 4 10 16 8 2 6 7 6 12 6 17 6 is equal to ...
... Divide first when you can . Divide 9 by ; 12 by † ; 16 by ; 20 by 3 . Of the fractional parts of a pound and a shilling OF A POUND . S. d . OF A SHILLING . d . is equal to 10 0 5 0 15 0 6 8 13 4 3 4 10 16 8 2 6 7 6 12 6 17 6 is equal to ...
Σελίδα 18
... divide them by 12 . Demonstration . - Taking shillings as pence is equal to dividing by 12 , and then dividing again by 12 , is equal to dividing by 144 . Example . - One article at £ 3 . 6s . per gross . £ 3 . 6s . = 66s . 66d . divided ...
... divide them by 12 . Demonstration . - Taking shillings as pence is equal to dividing by 12 , and then dividing again by 12 , is equal to dividing by 144 . Example . - One article at £ 3 . 6s . per gross . £ 3 . 6s . = 66s . 66d . divided ...
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1.-Arithmetic 3.-NUMERATION teaches Appendix article cost avoirdupois black board bushels clear views Demonstration.-Taking farthings Demonstration.-The interest denominator dividing by 48 DONCASTER drachm equal to dividing equal to multiplying Example.-One examples farthings as shillings farthings is equal find the interest find the value gallons given number gross improper fraction Knight's Arithmetic less number less than unity low numbers Measure multiplying by 48 number be divided number of articles number of figures number of months number of pence number of pounds number of shillings Omitting Sundays OTLEY ounce particular number pence as shillings pounds as pence quotient rate per cent RULE.-Divide RULE.-Multiply RULE.-Reckon RULE.-Take score shillings as farthings shillings is equal squirrel stole stone Subtraction sum of money take the aliquot Troy Weight unit figure views of number week whole number write any number yards
Δημοφιλή αποσπάσματα
Σελίδα 9 - RULE. Multiply all the numerators together for a new numerator, and all the denominators for a new denominator: then reduce the new fraction to its lowest terms.
Σελίδα 40 - DIVISIONS OF THE CIRCLE. 60 Seconds = 1 Minute. 60 Minutes = 1 Degree. 30 Degrees = 1 Sign. 90 Degrees = 1 Quadrant. 360 Degrees, or 12 Signs = 1 Circumference. Formerly the subdivisions were carried on by sixties ; thus, the second was divided into 60 thirds, the third into 60 fourths, &c.
Σελίδα 11 - To find the value of 100 articles, the price of one being given. RULE. — For every farthing in the price take as many pence, and twice as many shillings. Thus, 100 pencils at 1-Jd. each is 12«.
Σελίδα 36 - To find the interest of any sum of money at any rate per cent, for any given time. Ex. 1. What is the interest of $ 26.25 for 2 years, 4 months, at 7 per cent.
Σελίδα 40 - Thirty days hath September, April, June, and November, February hath twenty-eight alone, and all the rest hath thirty and one.
Σελίδα 39 - Weight. 16 drams — 1 ounce. 16 ounces = 1 pound. 14 pounds = 1 stone.
Σελίδα 39 - LENGTH. 12 inches = 1 foot 3 feet = 1 yard 5| yards = 1 pole or perch 40 poles =• 1 furlong 8 furlongs = 1 mile 3 miles = 1 league...
Σελίδα 33 - Prove one of the following rules of mental arithmetic in such a way as to make it intelligible to a class of children. 1. To find the value of 144 things in shillings, multiply the price in farthings by 3. 2. To find the interest of any sum of money for any number of months at any rate per cent., count one penny for each £10 in the principal, then multiply by the number of months and by double the rate per cent.
Σελίδα 39 - Apothecaries' system 20 grains 1 scruple 3 scruples 1 drachm 8 drachms 1 ounce 12 ounces 1 pound...
Σελίδα 39 - Sq. Yards = 1 Perch or Rod 40 Perches = 1 Rood 4 Roods = 1 Acre 640 Acres = 1 Sq. Mile 3. MEASURES OF SOLIDITY AND CAPACITY. DIVISION I — SOLIDITY. 1728 Cubic Inches = 1 Cubic Foot 27 Cubic Feet = 1 Cubic Yard DIVISION IL — CAPACITY.