# Practical and Mental Arithmetic: On a New Plan, in which Mental Arithmetic is Combined with the Use of the Slate ...

Richardson, Lord and Holbrook, 1830

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### Περιεχόμενα

 º 4 Multiplication 13 Mental Exercises combined with Exercises for the Slate 19 Simple Addition 27 Simple Subtraction 33 Simple Division 43 43 Questions on the foregoingr 51 Practice º Money 64
 Compound Addition 89 Compound Multiplication 97 To change a Mixed Number to an Improper Fraction iº 107 To multiply a Whole Number by a Fraction 110 AlligationAlligation Medial 228 Extraction of the Square Rootits Application 244 Annuities at Compound Interest 251 5 257

### Δημοφιλή αποσπάσματα

Σελίδα 21 - Decedents," and to repeal said original sections, -and to repeal sections one (1), two (2), three (3), four (4), five (5), six (6), seven...
Σελίδα 245 - Hence, when the extremes and number of terms are given, to find the common difference, — Divide the difference of the extremes by the number of terms, less 1, and the quotient will be the common difference.
Σελίδα 199 - But if any payments be made before one year's interest hath accrued, then compute the interest on the principal sum due on the obligation for one year,* add it to the principal, and compute the interest on the sum paid from the time it was paid up to the end of the year; add it to the sum paid, and deduct that sum from the principal and interest added together.
Σελίδα 53 - TABLE. 10 Mills (m.) = 1 Cent . . ct. 10 Cents = 1 Dime . . d. 10 Dimes = 1 Dollar . \$. 10 Dollars = 1 Eagle . E.
Σελίδα 173 - Bought 40 gallons of molasses, at 27 cents a gallon ; but, by accident, 4 gallons leaked out ; at what rate must I sell the remainder, per gallon, to lose nothing?
Σελίδα 242 - Multiply the divisor, thus augmented, by the last figure of the root, and subtract the product from the dividend, and to the remainder bring down the next period for a new dividend.
Σελίδα 76 - In 2 ? In 3 ? In 4? In 5? In 6? In 7? In 8? In 9? In 10? In 11 ? 5.
Σελίδα 255 - Two persons, A and B, have the same income: A saves |- of his yearly ; but B, by spending \$150 per annum more than A, at the end of 8 years, finds himself \$400 in*debt ; what is their income, and what does each spend per annum '? A.
Σελίδα 172 - B \$200, to be paid in 6 months ; \$300, in 12 months ; \$500, in 3 months ; what is the equated time for the payment of the whole?
Σελίδα 197 - ... due: add that interest to the principal, and from the sum subtract the payment made at that time, together with the preceding payments (if any) and the remainder forms a new principal ; on which, compute and subtract the interest, as upon the first principal: and proceed in this manner to the time of the judgment.