The lowest answer is: 10 x 0.01. This is because when you multiply these two numbers together, you are technically adding 0.01 ten times. This will leave you with the number 0.1. None of the other answers can create a smaller number because when you solve them, the create whole numbers (10-0.01 = 9.99, 10/0.01 = 1000, and 10 + 0.01 = 10.01).
