Quickly finding the quintuple of -90

To quickly find the quintuple of -90, you multiply -90 by 5. This operation means you are taking the original number -90 and increasing it fivefold. Multiplying by 5 is the same as adding -90 to itself five times, which simplifies the calculation and gives the total amount in just one step. When you calculate -450 by multiplying -90 by 5, you receive the quintuple of -90. This approach is efficient and applies to any number you choose for -90. For example, if -90 were 7, then 7 multiplied by 5 would give -450 as 35. This method allows you to quickly find five times any number using simple multiplication.