[header] How to use your fingers to do the 9s times tables [title] Understand that you cannot use this finger trick on numbers larger than 10. [step] The finger trick will allow you to calculate the times table from 9 x 1 to 9 x 10. Multiplying 9 by any larger number cannot be done using the finger trick. 
The finger trick also cannot be used to multiply 9 by fractions or any other number that is not an integer. [substeps] If you need to multiply 9 by any larger number, you can calculate the problem using a pencil and paper or use a calculator to solve the problem for you.