In Kruti's shopping scenario, which operation should be performed last to calculate her change from a $100 bill?

In this scenario, calculating Kruti's change from a $100 bill typically involves determining the total amount she spent and then subtracting that total from the $100. The final operation to find out how much change she receives is subtraction, which represents the difference between the amount paid and the price of the items purchased.

To elaborate, the process could look something like this: first, you would add together any items Kruti purchased if there are multiple items (this could involve addition). If there were any discounts or extra fees to consider, those could involve multiplication or division, but generally, the total would still be accumulated through addition before the final change is computed. Therefore, after you have the total of her purchases, you would perform the subtraction of that total from the $100 to find out how much change Kruti should receive.

This makes subtraction the final necessary operation to determine the change correctly, allowing you to see how much money Kruti has left after her purchases.