Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση
[blocks in formation]

17. Cost $483.136; sold for $640.328.

18. 60 cts., 70, 80, 90, 100, 110, 120. 19. 84 cts., 96, 108, 120, 132, 144.

21. 41d., 51, 51, 61, 61, 71, 71, 81, 81, 81. 22. 218., 21, 211, 37, 31, 41, 42, 51.

23. £118, 2, 218, 3, 3, 318, 318, 4, 4%, 418, 418,

5, 5, 58, 6.

Page 80.

24. 9303 farthings.

26. £39 19s. 3d. 3 far.

25. £39442 Os. Od. 1 far. 27. £1 19s. 2d. 0 far.

[blocks in formation]

22. 831 gills.

56. 1440 yd.;

Page 90.

23. 633 pt.

Page 93.

1200 yd.; 960 yd.; 640 yd.; 480 yd.;

[merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

$47; $70.50; $117; $128.10.

10. $11.87; $12.811; $191; 8461; $1191; $157; $1881; $3491.

11. $260; $310; $500; $525; $690; $735; $780; $825; $1510; $1995.

12. $37; $25; $121; $10; $20; $30; $40; $60; $70.

13. $198.

[blocks in formation]
[blocks in formation]

Page 147.-Ex. 6. $1000. Ex. 7. $1000.

Page 149,-Ex. 5. 2597937 francs. Ex. 6. $5000.

Page 150.-Ex. 10. $5000.

[blocks in formation]

SERIES OF EQUAL RATIOS.

Page 174.-Ex. 4. 3280.

COMPOUND INTEREST.

Page 177.

To find a number greater than any given in the table.

As Rx R2 = R4, hence, the product of any two tabular numbers will be the tabular number for the sum of the years corresponding to those numbers.

Thus, tab. No. opp. 20 years x tab. No. 20 × tab. No. 10 tab. No. opp. 50 years.

Tab. No. of 20 x tab. No. 9 = tab. No. 29, etc.

Page 180.-Ex. 5. $1000.

THE METRIC SYSTEM.

The Metric System is a decimal system of measures. and weights used in France and many other countries. It corresponds to our decimal system and is likely to become general, as the benefits of a general system are obvious.

The units of this system are the Metre, the Are (pronounced air), the Litre (pronounced leetur), the Gram, and the Stere (pronounced Stare).

The unit holds a central position as in abstract numbers, and the orders to the left increase by tens, and are designated by the prefixes deca, hecto, kilo, and myria, whilst the decimals to the right diminish by tenths, hundredths, etc., and are designated by the prefixes deci, centi, and milli.

The unit of length is the Metre from which the name of the system is derived, and its length is 1000000 of an arc of 90 degrees or the circumference of the earth, and equals 39.37079 inches.

MEASURES OF LENGTH.

10 millimetres equal 1 centimetre 10 centimetres 66 1 decimetre

=

=

.3937079
3.937079

( 39.37079 =

10 decimetres

66

1 metre

=

3 ft. 3.37079 in.

[blocks in formation]

10 kilometres

66

1 hectometre = 3937.079

1 myr'iametre = 393707.9

The kilometre is the unit for expressing long distances.

39370.79

« ΠροηγούμενηΣυνέχεια »