The Decimal/SI System
La Sistema Decimal/SI
SI
• The International System of Units,
related by multiples of ten, that
allows quantities to be measured in
the exact same way throughout the
world.
• La sistema internacional de unidades,
relacionado por múltiplos de diez, que
permite que las cantidades se midan de la
misma manera exacta en todo el mundo
• A SI unit for measuring mass
• One kilogram is equal to 1000
grams.
• La SI unidad de masa
• Un kilogramo es igual que 1000
gramos.
What happens to the unit (ones place)
as it moves to the right side?
The unit (ones place) divides into ten
equal parts.
dime
the 10th part of a dollar,
equal to 10 cents
Written:
10¢
equals
10¢
equals
10¢
What happens to the tenths place as
it moves to the right side?
The tenths place divides into ten
equal parts.
cent
the 100th part
of a U.S. dollar
Symbol:
¢
equals
1¢
equals
1¢
What happens to the hundredths place as
it moves to the right side?
The hundredths place divides into ten
equal parts.
equals
0.1¢
equals
0.1¢
decimeter (dm)
decimetro (dm)
1 meter
A unit for
measuring length
1/10 or 0.1 of a
meter
1 dm
A hand is
about
1
decimeter
wide
one decimeter
How many centimeters are in a
decimeter?
The meter (unit) divides into ten
equal parts.
1 m = 10 dm
1 dm = 0.1 m
1 decimenter
equals ___ cm
1 dm
1 cm
1 decimeter is equal to ____ centimeters
1 decimenter
equals 10 cm
centimeter (cm)
centimetro (cm)
1 cm
1 centimeter is
1/100 or 0.01
of a meter
A fingernail is
about 1
centimeter wide
The meter (unit) divides into
hundreds equal parts.
1 m = 100 cm
1 cm = 0.01 m
millimeter (mm)
millimetro
(mm)
1 millimeter
A millimeter is
1/1000 or 0.001
of a meter
A dime is 1
millimeter thick
The meter (unit) divides into
thousands equal parts.
1 m = 1000 mm
1 mm = 0.001 m
1 cm = ___ mm
millimeter (mm)
millimetro (mm)
1 dm
1 mm
1 cm
•1 centimeter is equal to 10 millimeters.
•How many millimeters equal 1
decimeter?
1 dm = 100 mm
milliliter (mL)
millilitro (mL)
• A fraction of a
liter (1/1000 L)
• 1 cubic
centimeter is
equal 1 milliliter
Una fracción de un
litro (1/1000 L)
Un centimetro cubico
es igual que 1
millilitro
1 cm3 = 1 mL
(cc)
Fractional Units
(Decimal Places)
deci- (d)
tenth
0.1
-1
10
• Examples: decimeter,
decigram
centi- (c)
hundredth
0.01
-2
10
Examples: centimeter,
centigram
milli- (m)
thousandth
0.001
-3
10
Examples: millimeter,
milligram
micro-
(µ)
millionth
0.000001
-6
10
• Examples:
micrometer,
microorganisms
nano-
(n)
billionth
0.000000001
-9
10
Examples: nanometer,
nanoorganisms
pico- (p)
trillionth
0.000000000001
-12
10
Example:
picometer
femto-
(f)
quadrillionths
0.000000000000001
-15
10
Example:
femtometer
atto-
(a)
quintillionths
0.000000000000001
-18
10
Example:
attometer
zepto (z)
sextillionths
0.000000000000000001
-21
10
• Example:
zeptometer
yocto (y)
sepillionths
0.000000000000000000001
-24
10
Example:
yoctometer
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