Place your fingers as in the below 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).
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).
Play the same for the below multiplications | ||||
---|---|---|---|---|
6 × 6 = ? | 6 × 7 = ? | 6 × 8 = ? | 6 × 9 = ? | 6 × 10 = ? |
7 × 6 = ? | 7 × 7 = ? | 7 × 8 = ? | 7 × 9 = ? | 7 × 10 = ? |
8 × 6 = ? | 8 × 7 = ? | 8 × 8 = ? | 8 × 9 = ? | 8 × 10 = ? |
9 × 6 = ? | 9 × 7 = ? | 9 × 8 = ? | 9 × 9 = ? | 9 × 10 = ? |
10 × 6 = ? | 10 × 7 = ? | 10 × 8 = ? | 10 × 9 = ? | 10 × 10 = ? |
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