Q. What is simple Addition? A. It is when the sums to be added, are all of one kind: that is, all dollars, all yards, all pounds, &c. Q. When several sums are added together, what is the result called? A. The aggregate, the amount, or the sum total. Q. What is the RULE for simple addition? A. Place the several sums, so that the first or right hand figure of each line, may stand directly under each other: that is, units under units, tens under tens, &c. and draw a line underneath. Begin at the right hand, and add all the figures in the unit's column, together, and if their sum amount to ten or more, set down the right hand figure under the column added, and carry the left hand figure or figures, to the next left hand column or row. Proceed in the same manner through every row to the last, and then set down the whole amount of that column. Q. Why do you set down the right hand figure and carry the left ? A. The right hand figure always possesses the same simple or local value as the column which is added, and must therefore be placed under it: the left hand figure shows how many tens are contained in the amount of the added column, and as the figures increase from the right hand to the left, in a tenfold degree, all the tens contained in one column, must be added to the next, which will be carrying one for every ten. Q. How can you prove addition ? A. Begin at the top, and add the figures, (commencing with the units,) downwards, and if the second amount agree with the first, the work is supposed to be right. and 10 are 57 and 9 are 48 and 10 are 59 These tables should be well studied by every scholar, before he commences his arithmetic, and frequently recited. Table No. 2, should sometimes be varied in the rehearsal, from the order in which it is placed, as follows: 2 and 2 are 4, and 2 are 6, and 2 are 8, and 2 are 10, &c.; 3 and 3 are 6, and 3 are 9, and 3 are 12, and 3 are 15, &c. |