5 Tricks For Doing Math Quickly
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We understand that not everyone is good at juggling numbers. Students often find Maths a tricky subject only because they have to do so many calculations quickly. But, what if we say that we have some tricks for doing Math quickly? Now you no longer need to be intimidated by math problems, instead, you can solve questions quickly and gain confidence.
1. Adding Large Numbers
What is 2678+8732? Seeing a question like this will scare kids and they will calculate at least thrice to ensure that they have got the right answer. But here’s a trick.
- Make all these numbers multiples of 10
- Add the numbers
- Find how many numbers were added to round up the original numbers
- Subtract that number from the answer
For example: To find 2678+8732=?
- Make the numbers multiples of 10: 2680, 8740
- Add the numbers: 2680+8740= 11,420
- Find how many numbers were added to round the original numbers: 2680-2678= 2, 8740-8732= 8; 2+8=10
- Subtract that number from the answer: 11,420-10 = 11410 is the right answer.
2. Multiplying any number with 5
“Who will solve my Math problem?” If you often wonder this, here is a trick that will help you out. When you are multiplying 5 with an even number, it is easy to find the answer.
For example: 674x5 = ?
- Find the half of the number being multiplied by 5: 674/2 = 337
- Add a zero in the end to find the right answer: 3370.
When you are multiplying 5 with an odd number:
For example: 673x5 =?
- Subtract one from the number being multiplied by 5: 673-1 = 672
- Find the half of the number obtained: 672/2 = 336
- Add a 5 in the end to find the right answer: 3365
3. Multiplying any number with 11
If you are multiplying a two-digit number with 11:
For example: 98x11 =?
- Separate the two digits: 9 8
- Add them: 9+8 = 17
- Place the number obtained between the two digits. If the number obtained is greater than 9 then, put the one's digit in the space and carry the ten's digit: 1078
Here’s another example:
- 67x11=?
- 6 7
- 6+7= 13
- Answer: 737
4. Memorising value of Pi (π)
π= 3.141592
This decimal number is going to be very important for you in finding algebra homework answers. But what exactly is π? Pi is the ratio of the circumference of any circle to the diameter of that circle. Regardless of the circle's size, this ratio will always be equal to pi.
Generally, we use π= 3.14, but there could be a chance where you need to use the complete value. Here’s a quick way to remember it.
Just count the number of letters in each word of the sentence:
"How I wish I could calculate pi."
This becomes 3.141592.
5. Easy division rules
Suppose you have 210 pancakes and you want to know how you can split them evenly within your group. You can find this in a few seconds using these simple shortcuts:
- Divisible by 2 if the last digit is a multiple of 2.
- Divisible by 3 if the sum of the digits is divisible by 3.
- Divisible by 4 if the last two digits are divisible by 4.
- Divisible by 5 if the last digit is 0 or 5.
- Divisible by 6 if it passes the rules for both 2 and 3.
- Divisible by 9 if the sum of the digits is divisible by 9.
- Divisible by 10 if the number ends in a 0.
- Divisible by 12 if the rules for divisibility by 3 and 4 apply.
“Mathematics tricks not only make calculations easier but save a lot of time. As you will start solving questions quickly, Math would not appear such a difficult subject to you anyway, thereby boosting your confidence.,” says Joshua, who provides Math assignment help to college students.
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