what pattern can you use to multiply a number and 9 if you know 10 times the number? give an example.

To multiply a number by 9 when you know the number multiplied by 10, you can use the pattern of subtraction. Here's how you can do it:

1. Start with the given number multiplied by 10.
2. Subtract the given number from the result obtained in step 1.

Here's an example:

Let's say the number is 7 and you know that 7 multiplied by 10 is 70. To find the product of 7 multiplied by 9 using this pattern, follow these steps:

1. Start with 70 (7 multiplied by 10).
2. Subtract 7 from 70: 70 - 7 = 63.

Therefore, 7 multiplied by 9 equals 63 using this pattern.

Please note that this pattern works specific to multiplying by 9 when you already know the result of multiplying by 10.