- Use Your Fingers to Multiply by 9
-
- 1st: Number the
digits
of your hands from left to right.
- 2nd: Bend the finger named by the number you wish to multiply.
- Ex. Multiply 4 x 9. The forth finger must be bent.
- 3rd: Count the digits to the left of the bent finger.
- Count the digits to the right of the bent finger.
- These are the digits of the
product.
- Ex. 3 then 6, so, 4 x 9 = 36.
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