Archive for the ‘Number’ Category
Monday, April 21st, 2008
Estimation in maths is not just about rounding up or down numbers.
It called for logically thinking and is done on a case-by-case basis.
Take for example, 302 x 11.
What is the estimated product of the 2 numbers?
We can choose for it to be 300 x 10, which gives 3000.
But how about ...
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Saturday, March 29th, 2008
A very common question maths student always ask is
"How many decimal places have I to use for this compution?".
This is not a simple question to answer.
Though the teacher may simply say "Use 3 decimal places" as a yardstick or to standardise marking or solutions, what is the underlying importance of selecting ...
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Monday, January 7th, 2008
I discovered that there are two numbers that amaze me. They are ZERO and ONE.
I had posted interesting facts about the number ZERO some time back. You may visit this post to read about ZERO.
How about the number ONE? What's so interesting?
5 x 1 = 5
35656 x 1 = 35656
What does ...
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Sunday, December 30th, 2007
What is zero?
Nothing?
Maybe.
1 + 0 = 1
2 + 0 = 2
5 - 0 = 5
So what is this "0" doing?
Nothing to the effect, right? With or without the number "zero", the answer is the original. It has nothing to do with the final answer.
What about 3 x 0? It has ...
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Sunday, December 23rd, 2007
Look at the math question below. It is a valid question and is correct.
Think about its math principles in term of number base.
The question:
2 + 2 = 10 can be correct. Why?
We have always assumed that numbers are to the base of 10.
In the above case, it can be correct when their ...
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Wednesday, December 19th, 2007
Everyone can count. We have been taught to count since young.
The age to learn counting is getting younger. And it is now the norm even before getting to pre-school.
But there is something called the Number base that may be oblivious to us.
What is this Number Base?
The normal counting that we are ...
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