Daboll's Schoolmaster's Assistant: Improved and Enlarged, Being a Plain Practical System of Arithmetick, Adapted to the United States |
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Page 15
It teaches to exa press the value of any proposed number by the following
characters , or figures : 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ... which depends upon the place it
stands in , viz . any figure in the place of units , represents only its simple value ,
or so ...
It teaches to exa press the value of any proposed number by the following
characters , or figures : 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ... which depends upon the place it
stands in , viz . any figure in the place of units , represents only its simple value ,
or so ...
Page 16
8 7 6 5 4 3 2 1 - 87 million 654 thousand 321 . 9 8 7 6 5 4 3 2 1 - 987 inillion 654
thousand 321 . 1 2 3 4 5 6 7 8 9 - 123 million 456 thousand 789 . 9 8 7 6 5 4 3 4 8
- 987 million 654 thousand 348 . To know the value of any number of figures .
8 7 6 5 4 3 2 1 - 87 million 654 thousand 321 . 9 8 7 6 5 4 3 2 1 - 987 inillion 654
thousand 321 . 1 2 3 4 5 6 7 8 9 - 123 million 456 thousand 789 . 9 8 7 6 5 4 3 4 8
- 987 million 654 thousand 348 . To know the value of any number of figures .
Page 17
For convenience in reading large numbers , they may be divided into periods of
three figures each , as follows : 987 , Nine ... writing each figure according to its
proper value in numeration ; taking care to supply those places of the natural
order ...
For convenience in reading large numbers , they may be divided into periods of
three figures each , as follows : 987 , Nine ... writing each figure according to its
proper value in numeration ; taking care to supply those places of the natural
order ...
Page 18
Having placed units under units , tens under tens , & c . draw a line underneath ,
and begin with the units ; after adding up every figure in that column , consider
how many tens are contained in their sum ; set down the remainder under the
units ...
Having placed units under units , tens under tens , & c . draw a line underneath ,
and begin with the units ; after adding up every figure in that column , consider
how many tens are contained in their sum ; set down the remainder under the
units ...
Page 19
... and reckon the figures downwards in the same manner as they were added
upwards , and if it be right , this sum total will be equal to the first : Or cut off the
upper line of figures , and find the amount of the rest ; then if the amount and
upper ...
... and reckon the figures downwards in the same manner as they were added
upwards , and if it be right , this sum total will be equal to the first : Or cut off the
upper line of figures , and find the amount of the rest ; then if the amount and
upper ...
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Bibliographic information
| Title | Daboll's Schoolmaster's Assistant: Improved and Enlarged, Being a Plain Practical System of Arithmetick, Adapted to the United States |
| Author | Nathan Daboll |
| Publisher | Mack and Andrus, 1827 |
| Original from | Harvard University |
| Digitized | 25 Aug 2007 |
| Length | 252 pages |
| Export Citation | BiBTeX EndNote RefMan |