To subtract, we may proceed in either of two ways.
To add or subtract decimals, we must reduce them to the same denomination, i.e.
She can add and subtract with great rapidity up to the sum of one hundred; and she knows the multiplication tables as far as the FIVES.
Thus by adding 2 to aN we can subtract N from aN+2, obtaining 2000-0000, which is =2.
In incomplete partition the quotient is 3, and the remainders 11 and 17 are in effect disregarded; if, after finding the quotient 3, we want to know what remainder would be produced by'a direct division, the simplest method is to multiply 3 by 2 4 0 and subtract the result from 935.