Learn New Tricks for Mathematics

 

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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
= 176

However, if the sum is greater than 10, you need to add 1 to the first digit.

29 x 11
2 + 9 = 11
= 319

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
= 3498

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 info@ahead.edu.ph.

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