OK.. So I am not sure that the fear of numbers is called 'Numberophobia'. But then, this is not a post on English and Etymology, is it?
Many students fear mathematics. Their fear and/or disdain for the subject is uniform for all aspects of this subject: arithmetic - algebra - geometry - calculus - You name it, we hate it!
Now I can't claim to have a liking for stuff like calculus and statistics. But then, who requires calculus and statistics to clear the kind of entrance exams that we are preparing for, eh?
So here are a few tips and tricks on how to hone your quick calculation skills.
Now, before we understand the tricks to do quick calculations, we must have a few thing ready before hand. Then include, a working knowledge of multiplication tables.... (it's ok if you remember the tables for only single digit numbers, it's ok if you remember the tables for only 1, 2, 5 and 10!)
You should be able to add and subtract reasonably well.
If you are OK with this, then proceed!
So, you are given 13 x 25
There are many ways in which we can orally calculate the answer:
1. 25 x 13 = 25 x (10+3) = (25x10)+(25x3) = 250 + 75 = 325
2. 13 x 25 = (13 x 100/4) = 1300/4 = 650/2 = 325
3. 13 x 25 = 13 x (10 + 10 + 5) = 130 + 130 + 65 = 325
Easy eh?
Remember these tricks:
To multiply a number with 2, just double it
Multiplication by 4 = Double of Double
Multiplication by 5 = Half of 10 times the number
Multiplication by 6 = (Multliplication by 5) + 1 times the number
Multiplication by 9 = 10 times the number minus 1 time the number
25 = 100/4
45 = 50 - 5
27 = 25 + 2 = (100/4) + 2
and so on...
Regular practice and you will soon be competent to multiply any two 2-digit numbers orally!
Here's a little game that can help you practice....
On the road, you get to see many vehicles with number plates. Make it a regular habit of adding up all the digits on the plate and also finding their product.
Regular practice will soon make you a calculation champ!
Many students fear mathematics. Their fear and/or disdain for the subject is uniform for all aspects of this subject: arithmetic - algebra - geometry - calculus - You name it, we hate it!
Now I can't claim to have a liking for stuff like calculus and statistics. But then, who requires calculus and statistics to clear the kind of entrance exams that we are preparing for, eh?
So here are a few tips and tricks on how to hone your quick calculation skills.
Now, before we understand the tricks to do quick calculations, we must have a few thing ready before hand. Then include, a working knowledge of multiplication tables.... (it's ok if you remember the tables for only single digit numbers, it's ok if you remember the tables for only 1, 2, 5 and 10!)
You should be able to add and subtract reasonably well.
If you are OK with this, then proceed!
So, you are given 13 x 25
There are many ways in which we can orally calculate the answer:
1. 25 x 13 = 25 x (10+3) = (25x10)+(25x3) = 250 + 75 = 325
2. 13 x 25 = (13 x 100/4) = 1300/4 = 650/2 = 325
3. 13 x 25 = 13 x (10 + 10 + 5) = 130 + 130 + 65 = 325
Easy eh?
Remember these tricks:
To multiply a number with 2, just double it
Multiplication by 4 = Double of Double
Multiplication by 5 = Half of 10 times the number
Multiplication by 6 = (Multliplication by 5) + 1 times the number
Multiplication by 9 = 10 times the number minus 1 time the number
25 = 100/4
45 = 50 - 5
27 = 25 + 2 = (100/4) + 2
and so on...
Regular practice and you will soon be competent to multiply any two 2-digit numbers orally!
Here's a little game that can help you practice....
On the road, you get to see many vehicles with number plates. Make it a regular habit of adding up all the digits on the plate and also finding their product.
Regular practice will soon make you a calculation champ!
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