Wouldn’t it be cool and exciting to find yourself solving Math problems in just a blink of an eye? Yes, without using a calculator, one can easily crack some Mathematical equations by doing the computations mentally. Here are some basic yet handy and short tricks you can use for your everyday Math problems.
Trick #1 Adding in Parts
When adding two-digit numbers, simply break the number into its tens and ones, and then add them up.
16 + 11
= 10 + 10 + 6 + 1
= 10 + 10 + 7
Trick #2 Subtracting from Left to Right
For subtraction that requires borrowing, simply round the subtrahend (second number) up to a multiple of ten. Subtract the rounded number from the minuend (first number), and then add back the difference you got from rounding up the subtrahend (second number).
85 – 27
= 85 – 30
= 55 + 3
Trick #3 Multiplying by 4
When multiplying a number by four, simply double the number twice.
Trick #4 Multiplying by 5
When multiplying a number by 5, simply divide the number in two, and then multiply it by 10.
Trick #5 Multiplying by 11
When multiplying two-digit numbers by 11, simply add the digits, and then place it in the middle of them.
16 x 11
1 + 6 = 7
However, if the sum is greater than 10, you need to add 1 to the first digit.
29 x 11
2 + 9 = 11
You can also apply the same trick if you want to multiply three-digit numbers by 11.
318 x 11
3 + 1 = 4
1 + 8 = 9
The ones given above are just SOME of the many useful tricks we can use in doing mental Math.
If you want to learn more, our AHEAD Online tutors will be more than happy to teach you. For more information, contact firstname.lastname@example.org.