which a table could be generated from 1 to 127, because 63+64 127. MENTAL EXERCISES. 1. How many are 5 and 4? 6 and 8? 6 and 3? 2. How many are 9 and 6? 8 and 9? 12 and 8? Remark, in relation to the utility of proposing questions to be answered mentally in addition, the plan is very good, but in order to be expert in answering, the pupil should be required to recite the Addition Table. Mental exercises answer very well for small children, and for such, I would recommend "Colburn's First Lessons." 1. Bought an orange for 3 cents, and nuts for 6 cents. How much did all cost? 2. Richard has 10 cents and Robert has 4 cents. How many have both? 3. You gave 12 cents for a knife, 4 cents for an inkstand and 1 cent for a slate pencil. How much will all of them come to? 4. If you have 4 nuts in one hand and 4 in the other. How many in both? 5. Thomas has 35 marbles in one pocket and 21 in the other. How many in both? The teacher can propose similar questions to suit the capacity of the pupils. DOLLARS AND CENTS. The addition of dollars and cents is the same as the addition of whole numbers, with the exception of pointing out 2 figures, beginning at the units place for cents. dolls. cts. Add 1349.16 4469.74 dolls. cts. Add 64669.74 44242.68 dolls. cts. Add 4.99 6.66 111 9324.68 6466.67 9464.63 93646.95 9.87 44668.67 4.63 APPLICATION. 1. A gentleman gave $17.50 cents for a coat, $12 for pantaloons, $5.50 for a hat; what did they all come to? Ans. $35. 2. A merchant sent out his clerk to collect money; he collected $50 from one person, from a second $14.94, from a third $53.35, and fourth $31.43 cts.; how many dollars did he collect in all? Ans. $149.72 cts. 1. How many half cents in a cent? Ans. 2. Ans. 4. 3. How many quarter cents in half a cent? Ans. 2. 1. I owe a merchant $7.00 for sugar, $5 for coffee, $17 for flour, $3 for tea, and $2 for salt. What is the whole sum? Ans. 34 dollars. 2. A merchant bought 4 pieces domestic muslin, as follows; No. 1 contained 28 yards, for $2.80; No. 2 contained 29 yards for $3.19 cents; No. 3 contained 28} yards, cost $3.131; No. 4, 271 yards, cost $3.02 cents. How many yards in the whole, and what did they all come to? A Butcher bought of one man 25 head of cattle for $450.87, of another 15 head for $200.75, and of another 9 head for $77.621. How many did he buy and what did the whole come to? Ans. 59 head, whole cost $729.25. ADDITION, OR AGREEABLY TO A MERCANTILE PHRASE, "FOOTING" OF DOLLARS AND CENTS. A owes to one creditor 569 dollars, to another 3961, to another 581, to another 6116, to another 469, to another 506, to another 69381, and, to another 1261; what does he owe them all? Ans. $82871.00 The mode of footing here introduced, has been adopted in the Bank of the United States some years ago, and, of course, has been used by the best Book-keepers in the Union, on account of the plan, being not only simple, but ingenious. Place the addition of every column of figures to be added, under each other. Then when set down, reject the ten's place in every line except the LAST line. The ten's place being cut off, or rejected, in every line except the last, there remains 82871. The lower figure 8 being set down first, 2 next, 8 next, 7 next, and 1 next; which written, will appear as above, 82871. dolls. cts. Add 4168.34 7816.56 8423.46 9814.34 6813.49 $37036.19 As before, add up every column in succession, which place under each other, and reject or cut off the ten's place, and you have a correct addition in one line. By adding up, every line, simply without carrying to the units place, but "skipping" one figure back, every time, until you get through. A sufficient proof in itself, that units must be placed under units, tens under tens, hundreds under hundreds, and THOUSANDS under thousands, &c., or cents under cents, and dollars under dollars, in the same order, thus: |