How is 18 divided by 4 4.5?

4 times 4.5 is 18. The opposite of multiplication is division, therefore 18 divided by 4 is 4.5. Also, 4 times 4 is 16 and 4 times 5 is 20. Halfway between 4 and 5 is 4.5 and halfway between 16 and 20 is 18..