Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση

207. In reading metric numbers, the name of the unit may be applied to all on the left of the decimal point, and the name of the smallest denomination denoted to all on the right of the point.

m

Thus,

42.73 may be read forty-two, and seventy-three hundredths meters; or, forty-two meters, and seventy-three centimeters.

8.675 Km may be read eight, and six hundred seventy-five thousandths kilometers; or, eight kilometers, and six hundred seventy-five meters.

1. How many meters and hundredths of a meter are expressed by 7.25 m ?

2. How many kilometers and thousandths of a kilometer are expressed by 8.407 Km?

3. How many meters and centimeters does 7.25 m express ? 4. How many kilometers and meters does 8.407 Km express ?

5. How many centimeters in 4.15 m? How many meters

in 7.384 Km ?

6. Reduce 784 centimeters to meters; 6453 meters to kilometers.

208. SURFACE MEASURES.

100 square millimeters (sq mm) are 1 square centimeter, sq cm.

[blocks in formation]
[blocks in formation]

1. The square meter is used in measuring ordinary surfaces; the square kilometer, in measuring the area of countries; and the are and hektare, in measuring land.

2. The square meter is about 10 square feet, or 1 square yards; and the hektare, about 2 acres.

3. As 100 units of a smaller denomination make a unit of a denomination next larger, the scale is 100, and two places of figures must be allowed for each denomination. Thus,

Ha

1 Square Centimeter.

31 14 a 17 ca, written as ares, is 3114.17a, which may be read 3114 ares, and 17 centares; and, written as hektares, is 31.1417 Ha, which may be read 31 hektares, and 1417 centares.

7. In 4 square meters how many square decimeters? In 4 square centimeters how many square millimeters?,

8. Express 65.41a as centares; as hektares.

9. How many ares in 5734 ca ? How many hektares in 6893 a?

209. VOLUME MEASURES.

1000 cubic millimeters (cu mm) are 1 cubic centimeter, cu cm.

[blocks in formation]

1. The cubic meter, the unit of ordinary solids, takes the name of

stere when applied to the measuring of wood and lumber.

2. The cubic decimeter is about 61 cubic inches; the cubic meter, or stere, about 351 cubic feet.

3. Where, as in the table, 1000 units of a smaller denomination make a unit of a denomination next larger, the scale is 1000, and three places of figures must be allowed for each denomination. Thus,

1 Cubic Centimeter.

13 cu m 406 cu dm 578 cu cm, written as cubic meters, is 13.406578 cu m, which may be read 13 cubic meters, and 406578 cubic centimeters; and, written as cubic decimeters, is 13406.578 cu dm

10. In 6 cu m

how many cubic decimeters? In 8 cu dm how many cubic centimeters?

cu mm

11. In 7000 Cu how many cubic centimeters? In 9000 cu dm how many cubic meters?

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]
[subsumed][merged small][graphic]

14. How many liters, and what decimal of a liter, are expressed by 6.451?

15. How many kiloliters, and what decimal of a kiloliter, are expressed by 9.750 KI?

16. How many centiliters are 6 liters? 7.55 liters?

17. How many liters in 600 centiliters? How many kiloliters in 6000 liters?

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][graphic][subsumed][subsumed][subsumed]

In weight

1 gram

1 gram

Equivalents.

= 1 cu. centimeter, or 1 milliliter of water.

1 kilogram = 1 cu. decimeter, or 1 liter of water.

1 metric ton = 1 cu. meter, or 1 kiloliter of water.

[blocks in formation]

1 gram =

[blocks in formation]

0.03527 ounce av.

1 metric ton 1.1023 tons.

NOTE. The weight of the gram is determined when the water is pure and at the temperature of its greatest density, which is 39.20 Fahrenheit.

1. The gram is used in weighing letters, gold, and jewels, and in mixing medicines; the kilogram, or, for brevity, kilo, is used in weighing common articles; and the metric ton, in weighing very heavy articles.

2. The kilo is about 2 pounds; and the metric ton, about 1

common tons.

3. Of the United States coinage, the nickel five-cent piece weighs 5 grams; two silver half-dollars, 25 grams; and 80 silver half-dollars, a kilo.

4. A letter sent for a single postage must not exceed the weight of three nickels, or 15 grams.

18. In 5.65%, how many decigrams? How many centigrams?

19. In 5650 mg, how many centigrams? How many decigrams ?

20. In 6.315 Kg, how many grams? In 4.670 TM,

kilos ?

how many

21. What decimal part of a kilo is a gram? What decimal part of a metric ton is a kilo?

22. At 20 cents a kilo, how many dollars will a metric ton of sugar cost?

23. A tank has the capacity of 5.250 kiloliters.

metric tons of pure water will it hold?

How many

24. I wish to weigh 8.75 Kg. How many silver half-dollars will serve for the weights?

« ΠροηγούμενηΣυνέχεια »