Place your fingers as in the image
and consider the value of fingers in each
hand to be 6, 7, 8, 9 and 10 - in the
order from small finger to thumb.
Example
Consider the multiplication of 7 × 8.
Make the finger numbered 7 in the left
hand to touch the finger numbered 8 in
the right hand.
Step 1:
Now in the left hand, count the finger
which is touching (7) and the ones below
that = 2 fingers
Similarly in the right hand, count the
finger which is touching (8) and the ones
below that = 3 fingers
Add the above counted fingers = 2 + 3 =
5 fingers
Multiply the number by 10 = 5 × 10 = 50
-----> (1)
Step 2:
In the left hand, count the fingers
above the touching finger = 3 fingers
Similarly in the right hand, count the
fingers above the touching finger = 2
fingers
Multiply both = 3 × 2 = 6 -----> (2)
Step 3:
Add (1) and (2),
= 50 + 6 = 56
So, the answer for 7 × 8 = 56 which is
easily found through the above trick.
Note:
If there is no finger above the considered
(touched) finger, then consider the value
as zero (0).
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