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Multiplication Tricks Multiply by 11 The eleven times table has
always been very easy to learn up to 9 x 11. Write down the first digit. Example 1 - 425 x 11 First number = 4 Example 2 - 5890 x 11 First number = 5. Multiply by 111 This is also simple upto 9 x 111. But, after 9!!! Yes, there's a way of multipling numbers by 111 too. The trick is very close to the way of multipling numbers by 11. So, study the examples and try. Maybe you will think this is so hard trick. But, if you learn it good it is not hard. Here's the trick for two digit numbers. Write down the first digit. Example 3 - 52 x 111 First number = 5. Example 4 - 96 x 111 First number = 9. Let's move on to the three digit numbers. Write down the first digit.
Add the first and second digits. Example 5 - 256 x 111 First number = 2. Now, try this trick for multipling numbers by 1111. 9 x 1 to 9 x 10 Now, I'm going to teach you
a simple way of multipling numbers by 9 with your fingers. Example 6 - 6 x 9 Put the finger representing
6 down. To the left of the down finger, you have 5 fingers up. That's
your tens digit 5. Example 7 - 10 x 9 Hold down your last finger
(10th finger). There's 9 fingers up on the left side. So, the tens digit
is 9. There is a simple way to multiply a number by any number of 9's. Append 0's to the multiplicand
as there 9's in the multiplier. Example 8 - 435 x 99 There's two 9's for 99. So
append two 0's into the 435. It is 43500. Example 9 - 634 x 999 634000 - 634 = 633366 |