Learning Number / Ancient Roma

Learning Number / Ancient Roman numerals IVXLCDM - Math LessonsIn the days of yore the ancient roman people use their own numbering system which is very different from penomeran at times like now. Roman numerals only consists of 7 numbers with a specific letter symbols in which each letter melangbangkan / has the meaning of certain numbers, namely:
I / i for number one / 1V / v to the number five / 5X / x to number ten / 10L / l for fifty digits / 50C / c for the number one hundred / 100D / d for the number five hundred / 500M / m for the number one thousand / 1000Some of the shortcomings or weaknesses of the Roman numeral system, namely:1. No zero / 02. Too long to mention specific numbers3. Limited to small numbers

Build Space Formulas - Mathematics

Cube Formulas- Volume: The first multiply both sides multiplied by the third side (S rank 3)

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

Formulas Ball- Volume: pi multiplied by the radius multiplied by the high rank of three times four thirds (4 / 3 x pi xrxtxtxt)


- Size: pi times radius squared multiplied by four (4 x phi xrxr)
The formula Limas Four Aspects- Volume: Length times width times height divided by three (pxlxtx 1 / 3)
- Area: ((p + l) t) + (p x l)

Secret formulas "Fast" Mathematics

Once, when I was new to the new student's first level, I became acquainted with one of the other new students who later became my best friend. When the initial introductions, we were chatting here and there. Ask questions here and there. Answer it, answer here. Until he was finally told bahwaa Basic Mathematics test scores of his, that is one of the subjects tested in UMPTN *, is 100 alias correctly all.
Hearing his story, I was amazed he made. In my mind, I concluded "Well he certainly was a very clever". My admiration encouraging my curiosity about his knowledge in mathematics. Finally, in the early days of introduction, I invite he talked about the mathematics that we've learned when during the elementary through high school.From the conversation, I learned, it turns out he really broad knowledge of mathematics that have been learned. Until finally, perhaps to show his skill, he invited me to shoot quickly solving math problems.Received the challenge, I actually ngeper too. Since I was not as smart as him. However, because this name is also not a race and it's nothing, I still would have the time. The questions were selected at random from the book of practice questions tests and Exams UMPTN * ** a few years earlier that he was still diligently carry everywhere. Then, the race quickly solve math problems began.How did it go? Who's fastest?Sure enough, within minutes, my friend managed to solve all the problems we had chosen earlier (for the chosen only 3 problems still.) And he came out as the fastest, the winner. While I, one question I was not able to finish. At that time, I too struggled with the issue the first number is quite difficult for my size at that time. Despite the best of my ability try to finish it, but it turns out, until time runs out has not been met as well. I also acknowledge the advantages and prowess.With a little sheepishly, I asked him about a matter which I could not finish it. While I also ask why he so quickly can solve these problems. About the time that I can not finish is as follows.Problem: When a 1 / a = 5, then the value of a3 1/a3 = ...With a fast friend of mine that was solving the problem are as follows:1/a3 a3 = (a 1 / a) 3 - 3a.1 / a (a 1 / a) = 53-3 (5) = 125-15 = 110.Seeing part of the solution, I can only stare at that time. "Just one line? Though I tried to finish it rows and rows, and have not met too ", it is in my mind. Then, I asked to my friend, why the way the process like that?With pleasure, he also explained to me. He said that, these kind of problems can be easily solved with the formula "quickly" following.