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Once upon a time the ancient Roman people use a separate numbering that is very different penomeran system at the time as now. Roman numerals only consists of 7 numbers with a particular letter symbols in which each letter melangbangkan / specific numbers have meaning, namely:

I / i for the number one / 1
V / v to the number five / 5
X / x to number ten / 10
L / l for fifty numbers / 50
C / c for one hundred / 100
D / d for the number five hundred / 500
M / m for the number one thousand / 1000

Some of the shortcomings or weaknesses of the Roman numeral system, namely:
1. There are no zeros / 0
2. Too long to mention specific numbers
3. Limited to small numbers only

To cover the lack of limitations roman numerals on a small number, then made a thousand multiplier with the symbol above the strip line symbol letters (except I).

V / v to the line above to the number five thousand / 5000
X / x to the line above for the number ten thousand / 10,000
L / l with the line above to the number fifty thousand / 50,000
C / c with a line above for the number one hundred thousand / 100,000
D / d with the line above to the number five hundred thousand / 500,000
M / m with a line above for a million / 1000000

Method / Technique Roman numeral numbering:
1. Symbols written from the biggest to the smallest
2. All the symbols add up to big little small to large unless there is a reduction.

Examples of writing ancient roman numerals:
1. 16 = XVI
2. 35 = XXXV
3. 45 = XLV
4. 79 = LXXIX
5. 99 = IC
6. 110 = CX
7. 999th = CMXCIX
8. 1666 = MDCLXVI
9. 2008 = MMVIII

Teaching Parallelograms Parallelograms or row is a wake up flat triangle formed by the reflection if played half a round on one side he has.

The properties are owned by the parallelogram built flat is as follows:

1. The corners of the same line of sight is large.
2. The sides are facing each other are the same length and parallel.
3. The corners of adjacent if In total amounted to 180 degrees.
4. Diagonal of a parallelogram bisect each other the same length.

In general, primary school students are required to memorize the multiplication times-you from 1 to 10. It was very useful to strengthen the speed in solving the problem of calculating a simple multiplication to the difficult. Basic multiplication should be remembered in my head because the basic multiplication will always be used to education in college.

List of time-you / Multiplication Basic Standards Elementary School Elementary School Children The Necessary memorized:

1 x 1 = 1
1 x 2 = 2
1 x 3 = 3
1 x 4 = 4
1 x 5 = 5
1 x 6 = 6
1 x 7 = 7
1 x 8 = 8
1 x 9 = 9
1 x 10 = 10

2 x 1 = 2
2 x 2 = 4
2 x 3 = 6
2 x 4 = 8
2 x 5 = 10
2 x 6 = 12
2 x 7 = 14
2 x 8 = 16
2 x 9 = 18
2 x 10 = 20

3 x 1 = 3
3 x 2 = 6
3 x 3 = 9
3 x 4 = 12
3 x 5 = 15
3 x 6 = 18
3 x 7 = 21
3 x 8 = 24
3 x 9 = 27
3 x 10 = 30

4 x 1 = 4
4 x 2 = 8
4 x 3 = 12th
4 x 4 = 16
4 x 5 = 20
4 x 6 = 24
4 x 7 = 28
4 x 8 = 32
4 x 9 = 36
4 x 10 = 40

5 x 1 = 5
5 x 2 = 10
5 x 3 = 15
5 x 4 = 20
5 x 5 = 25
5 x 6 = 30
5 x 7 = 35
5 x 8 = 40
5 x 9 = 45
5 x 10 = 50

6 x 1 = 6
6 x 2 = 12
6 x 3 = 18
6 x 4 = 24
6 x 5 = 30
6 x 6 = 36
6 x 7 = 42
6 x 8 = 48
6 x 9 = 54
6 x 10 = 60

7 x 1 = 7
7 x 2 = 14
7 x 3 = 21
7 x 4 = 28
7 x 5 = 35
7 x 6 = 42
7 x 7 = 49
7 x 8 = 56
7 x 9 = 63
7 x 10 = 70

1 = 8 x 8
8 x 2 = 16
8 x 3 = 24
8 x 4 = 32
8 x 5 = 40
8 x 6 = 48
8 x 7 = 56
8 x 8 = 64
8 x 9 = 72
8 x 10 = 80

9 x 1 = 9
9 x 2 = 18
9 x 3 = 27
9 x 4 = 36
9 x 5 = 45
9 x 6 = 54
9 x 7 = 63
9 x 8 = 72
9 x 9 = 81
9 x 10 = 90

10 x 1 = 10
10 x 2 = 20
10 x 3 = 30
10 x 4 = 40
10 x 5 = 50
10 x 6 = 60
10 x 7 = 70
10 x 8 = 80
10 x 9 = 90
10 x 10 = 100

To keep in mind the concept of multiplication is the multiplier. This means that 5 times 5 equals 5 x 5 x 5 x 5 x 5

Happy Memorizing :)

A. Fold Symmetry
Fold symmetry is the number of folds that can be formed by a flat field into 2 equal parts. To find the symmetry of a fold-up flat it can be done by making an experiment with a piece of kertar is similar in size to be tested. Fold the paper folded in half to equal. Here are many fold symmetry of the general flat up:

- Rectangle has 2 fold symmetry
- Longitude Cage has 4 fold symmetry
- Segitiga Same Side has 3 fold symmetry
- Rhombus has 2 fold symmetry
- The circle has a fold symmetry of an infinite number

B. Symmetry Play
Play symmetry is the number of rounds that can be done on a flat wake up where the results will form the pattern of rotation is the same before playing, but instead returned to the starting position. Experiments can be performed similar experiments on fold symmetry but the way is to rotate the paper which had been formed. Here is a lot of play in the wake simeti general level:

- Rectangle has 2 symmetry around
- Longitude Cage has 4 symmetry around
- Segitiga Just Feet do not have the symmetry around
- Segitiga Same Side has 3 symmetry around
- Rhombus has 2 symmetry around
- The circle has a symmetry play an infinite number

Square formula
Square is built flat which has four equal sides of length
- Traveling: The length of one side multiplied by 4 (4S) (AB + BC + CD + DA)
- Size: The times the side (S x S)

Rectangle formula
Rectangle is built like a square flat but the two sides are facing shorter or longer than

the other two sides. The two sides called a long long, while the short-called wide.
- Traveling: width times length plus 2 ((p + l) x2) (AB + BC + CD + DA)
- Size: length times the width (pl)

Triangle Formulas
- Traveling: The first + second + hand side of the third (AB + BC + CA)
- Size: The length of the base times the height divided by two pangjang (AXT / 2)

Circle Formulas
- Round: diameter multiplied by phi (phi dx) or phi 2 times the radius (phi x (r + r)
- Size: phi times the radius times the radius (phi xrxr)
- Phi = 22 / 7 = 3.14

Parallelogram formula or parallelogram
- Traveling: The sum of the four sides of the existing (AB + BC + CD + DA)
- Size: base times the height (a x t)

Rhombus formula
- Traveling: The sum of the four sides of the existing (AB + BC + CD + DA)
- Size: length of the base times the diagonal divided by 2 (diagonal ax / 2)
- Diagonal: Line the two opposite sides

Trapezoid formula
- Traveling: The sum of the four sides of the existing (AB + BC + CD + DA)
- Size: The number of parallel sides times the height divided by 2 ((AB + CD) / 2)

Cube Formulas
Volume: The first two times multiplied by the third side (S rank 3)

Beam Formulas
Volume: length multiplied by width multiplied by height (LxWxH)

Formula Ball
Volume: phi multiplied times the radius of high-power three times in 4 / 3 (4 / 3 x phi xrxtxtxt)
Size: phi times the radius squared multiplied by four (4 x phi xrxr)

Four Aspects Limas formula
Volume: Length times width times height divided by three (pxlxtx 1 / 3)


Tube formula
Volume: phi times the radius times the radius times the height (phi x r2 xt)

Cone formula
Volume: phi times the radius times the radius times the height divided by three (phi x r2 xtx 1 / 3)
S: The sloping cone from the base to the top (not Cleaner)

Triangular prism formula square
Volume: base triangle times the height times the height triangular prism for the two (as x ts x tp x)

The following is a general unit of measure that can be converted to a variety of daily necessities are arranged in order from largest to smallest:

km = Kilo Meters
hm = hecto Meter
dam = Deka Meter
m = Meter
dm = Desi Meter
cm = centimeter
mm = Mili Meters

A. Conversion Unit Size Length
For unit length of the conversion from a level to one level below is multiplied by 10 while for the conversion of the upper level divided by the number 10. Example:

- 1 km is 10 hm
- 1 km equal to 1000 m
- 1 km equal to 100,000 cm
- 1 km equal to 1,000,000 mm
- 1 m equal to 0.1 dam
- 1 m equal to 0.001 km
- 1 m equal to 10 dm
- 1 m equal to 1000 mm

B. Unit Conversion Weight Size or Mass
For the unit of measure conversion weight similar to the size of the unit meters long but was changed to grams. For heavy forces did not have a square or a derivative grams grams per cubic meter. Examples:

- 1 kg equal to 10 hg
- 1 kg equal to 1000 g
- 1 kg equals 100,000 cg
- 1 kg equal to 1,000,000 mg
- 1 g equal to 0.1 dag
- 1 g equal to 0.001 kg
- 1 g equal to 10 dg
- 1 g equal to 1000 mg

C. Size Size Conversion Unit
Area unit of measure equal to the length, but in becoming one level below multiplied by 100. Similarly, an increase in one level above it divided by the number 100. Unit size is no longer meters wide, but square meters (m2 = m rank 2).

- 1 km2 with 100 hm2
- 1 km2 equal to 1,000,000 m2
- 1 km2 equal to 10,000,000,000 cm2
- 1 km2 equal to 1,000,000,000,000 mm2
- 1 m2 equal to 0.01 dam2
- 1 m2 equal to 0.000001 km2
- 1 m2 equal to 100 dm2
- 1 m2 equal to 1,000,000 mm2

D. Unit Conversion Size or Volume Contents
Area unit of measure equal to the length, but in becoming one level below multiplied by 1000. Similarly, an increase in one level above it divided by the number 1000. Unit size is no longer meters wide, but cubic meters (m3 = m, rank 3).

- 1 km3 equal to 1000 hm3
- 1 km3 equal to 1,000,000,000 m3
- 1 km3 equal to 1,000,000,000,000,000 cm3
- 1 km3 equal to 1,000,000,000,000,000,000 MM3
- 1 m3 equals 0.001 dam3
- 1 m3 equals 0.000000001 km3
- 1 m3 equal to 1000 dm3
- 1 m3 equals 1,000,000,000 MM3

How to Calculate:
Suppose we want to convert units of length 12 km to the size of cm. So to change km to cm down 5 levels or multiplied by 100,000. So the result is equal to 12 km 1,200,000 cm. Similarly, other unit of measure. The point is we must look at the level of size and value of the multiplier or pembaginya changed every increase or decrease the level / level.

Other size units:

A. Unit Size Length
- 1 inch / inch / inc / inch = equal to = 25.4 mm
- 1 ft / ft / ft = same as = 12 inch = 0.3048 m
- 1 mile / mile = same as = 5280 feet = 1.6093 m
- 1 nautical mile = same as = 6080 feet = 1.852 km

1 micron = 0.000001 m
1 elo long time = 0.687 m
1 pal Java = 1506.943 m
1 pal sumatera = 1851.85 m
1 acre = 4840 yards2
1 Cicero = 12 punt
1 Cicero = 4.8108 mm
1 hectare = 2.471 acres
1 inch = 2.45 cm

B. Size Unit Size
- 1 ha / ha / hecto are = equal to = 10,000 m2
- 1 are = equal to = 1 dm2
- 1 km2 = equal to = 100 hectares

C. Unit Size Volume / Content
1 liter / liter = 1 dm3 = 0.001 m3

D. Unit Size Weight / Mass
- 1 hundred pounds / quintal = equal to = 100 kg
- 1 ton = equal to = 1.000 kg
- 1 kg = equal to = 10 ounces
- 1 kg = equal to = 2 pounds