Thus by adding 2 to aN we can **subtract** N from aN+2, obtaining 2000-0000, which is =2.

Similarly we cannot **subtract** 8 from 15, if 15 means 1 ten + 5 ones; we must either write 15-815-8=(10+5)-8= (I o - 8)+5 = 2+5 = 7, or else resolve the 15 into an inexpressible number of ones, and then **subtract** 8 of them, leaving 7.

To **subtract**, we may proceed in either of two ways.

To compare them, or to add or **subtract** them, we must express them in terms of the same unit.

According to this law, Io+3+6-7= Io +3-7+6 = 3+6-7+10 = &c. But, if we write the expression as 3-7+6+10, this means that we must first **subtract** 7 from 3.

The process is the same as that of finding the sum or differ I ence of 3 sixpences and 5 fourpences; we cannot **subtract** 3 sixpenny-bits from 5 fourpenny-bits, but we can express each as an equivalent number of Ones.

To add or **subtract** decimals, we must reduce them to the same denomination, i.e.

To add or **subtract** fractional numbers, we must reduce them to a common denominator; and similarly, to multiply or divide surds, we must express them as power-numbers with the same index.

To **subtract** £3, 5s.

Thus to **subtract** 5s.

Into 12D., So That We **Subtract** £3, 5S.

On The Counting System It Will Be Found That, In Determining The Number Of Shillings In The Remainder, We **Subtract** 5S.

In actual practice, of course, we **subtract** large multiples at a time.

We first construct the multiple-table C, and then **subtract** successively zoo times, 30 times and I times; these numbers being the partial quotients.

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.

To find the square root of N, we first find some number a whose square is less than N, and **subtract** a 2 from N.

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.

I would not **subtract** anything from the praise that is due to philanthropy, but merely demand justice for all who by their lives and works are a blessing to mankind.