MATH TRICK - THE FINGER TRICK FOR 9s

 

The finger trick for multiplying by 9 is a neat and visual way to quickly find the product of 9 and any single-digit number. Here’s how it works:

The Finger Trick for 9s

1. Start with Both Hands: Hold out both of your hands in front of you with your fingers spread.

2. Choose the Number to Multiply by 9: Let’s say you want to multiply 9 by 4.

3. Bend Down the Finger Corresponding to the Number: For 4, count over 4 fingers from the left and bend down the fourth finger.

4. Count the Fingers to the Left of the Bent Finger: This represents the tens digit of the answer. In this case, there are 3 fingers left.

5. Count the Fingers to the Right of the Bent Finger: This represents the units digit of the answer. In this case, there are 6 fingers remaining.

6. Combine the Two Counts: The tens digit and units digit together form the number you’re looking for. For 9 times 4, you get 36.

Example

• To Multiply 9 by 7:
  1. Bend the 7th finger (from the left).
  2. Count the fingers to the left of the bent finger: 6.
  3. Count the fingers to the right of the bent finger: 3.
  4. The result is 63.

This trick works for multiplying 9 by any single-digit number from 1 to 10.