Are maths and you always at loggerheads with each other? Here are tricks that can help you solve math problems like a pro:
Learning maths techniques can help students to develop greater confidence in maths. Also, students should use this strategy to do calculations in mind. Once students mastered these tricks, they will be able to calculate in mind, develop confidence in maths problem solving, and increase accuracy.
Addition Trick
Adding large numbers in your head can be difficult, so begin with small numbers. Use round up techniques to make them more manageable. Thus to add big sums, break them into the nearest 100 and add up.
E.g.:- 388+78
(388-8) – (78-8)
380+70= 450
Subtraction Trick
To subtract quickly, break them into the nearest 100 and subtract. It makes the numbers more manageable, and you can easily calculate it into your mind without pen and paper.
E.g., 567- 153
(567-67)- (153-67)
500-86= 414
If you want to subtract any number from 1000, then subtract all the numbers from 9 except the last number. For example,
1000-567
9-5= 4
9-6= 3
10-7= 3
Thus, the answer is 433.
Multiplication Trick
Half the even number and double the other number.
E.g., 33*48 = 66*24 (the multiplier of 2 makes it easy)
When multiplying any even number with 5, then cut the even number into half and add zero at the end. For example,
5* 26
Half of 26 is 13
Now add 0 to it.
Thus the answer is 130.
When multiplying an odd number with 5, subtract 1 from the odd number to make it even number and then cut it into half. At the end of the number, add 5. For example,
5*7
7-1= 6
6/2= 3
Thus the answer is 35.
Division Trick
A number can be divided by a certain number is:-
- 10 if it ends by 0
- 9 when the digits are added up, and the total is evenly divided by 9
- 8 if the last three digits are evenly divisible by 8 are 000
- 5 if it ends in a 0 and 5
- 4 if it ends in 00 or a 2-digit number that is evenly divisible by 4
- 2 if it ends 0, 2, 4, 6, and 8
Percentage
Find 5% of 235:-
Step 1: Move the decimal point by one place, 235 becomes 23.5
Step 2: Divide 23.5 by number 2, the answer is 11.75
