tugas 3

nur rahmani ristiamarta
mat nr 07
07305144011
english II

ROMANIC NUMBER

Romanic number have still ever 300 BC. This number included one of number which much used in matemathic.

I represent number one ( 1)

V represent number five ( 5)

X represent number ten ( 10)

L represent number fifty ( 50)

C represent number a hundred ( 100)

D represent number five hundred ( 500)

M represent number a thousand ( 1000)

Rule to write romanic number.

• Obtain decrease system

Decrease rule

Romanic number which smaller located in left. Main number called decrease number. Maximal decrease only one number.

Example :

1. IV = 5 – 1 = 4

2. XL = 50 – 10 = 40

Above the example, appear that, if the smaller is located in left, so obtain decrease system.

• Obtain increase system

Increase rule

Romanic numberwhich smaller located in right. Main number called increase number, sum of increase number maximal 3 number.

Example =

1. VII = 5 +2 = 7

2. XV = 10 + 5 = 15

   • Obtain reapeating number

The romanic number symbol can used maxilla 3 times.

Example =

1. 133 = CXXXIII

2. 1988 = MCMLXXXVIII

Note :

1. A symbol romanic number which can not in one line are V, L, D.

Example =

1. LXXX = 80

2. CXXII = 122

1. Decrease in left main number maximum only one number.

Example =

1. IV = 4

2. XC = 90

3. I be able to to decrease V and X only

V was’nt as the symbol too decrease

X as the substract of L

L was’nt as the symbol too decrease

C as the substract of D

D wasn’t as as the symbol too decrease

EXERCISE =

1. MCMXC = .. 6. 2004 = ..

2. MCMXCIII = .. 7. DLXXIX = ..

3. 49 = .. 8. 1945 = ..

4. 1997 = .. 9. MC =

5. DLVIII = .. 10. 41 = ..

EXPLAIN WITH MY FRIEND

Day = Sunday, January 4^th 2009

Time = 9.00 am

Location = my home

My friend = ariska

I explained to Riska about Romanic number. Romanic number ever we studied in elementary school. But it has several years ago. So, when I tell to Riska about Romanic number . she said that she know about it. But, the constraint,Riska forgot. Then, I tell her about Romanic number from beginning.At first, she feel so difficult to understand about romanic number, it because we used English language and it not easy to know what the meaning of sentences. But after I explained with English language which easier to understand and I given her some example, she don’t need more time to understand. I given her some exercise and she can did it.

I think Riska is smart student. But, she must more exercise to understand English language. Because, when I explained to her about romanic number , she feel difficult in language. Not in material about romanic number.

My impression about Riska.

When riska explained about scale to me, I feel riska very understand about this material.

And it is make me easy and fastly to reserved about scale. She can make me understand aout it. So, I can did her exercise to me. Thank you riska because you have help me to understanf about scale.