36. To multiply a two-digit number by 99, you need to decrease this number by one and append the complement of the number to 100.
Instruction. Take a two-digit number $10 A+B$, multiply it by $99=100-1$ and, by adding and subtracting 100, transform the resulting expression into the form:

$$
100(10 A+B-1)+[100-(10 A+B)]
$$