Quickly finding the quintuple of -9

To quickly find the quintuple of -9, you multiply -9 by 5. This operation means you are taking the original number -9 and increasing it fivefold. Multiplying by 5 is the same as adding -9 to itself five times, which simplifies the calculation and gives the total amount in just one step. When you calculate -45 by multiplying -9 by 5, you receive the quintuple of -9. This approach is efficient and applies to any number you choose for -9. For example, if -9 were 7, then 7 multiplied by 5 would give -45 as 35. This method allows you to quickly find five times any number using simple multiplication.