ELI5: Explain Like I'm 5

Decimal place

Do you know how we use numbers like 1, 2, and 3 to count things like apples, toys, and cookies? These are called whole numbers because they don't have any parts or pieces. But sometimes we need to use numbers that have parts or pieces, like when we want to cut a pizza into smaller slices or split a candy bar with our friend. Decimal place is a way to show those parts or pieces of a number.

Imagine you have a pizza and you want to cut it into 10 slices so you and your friends can share it equally. Each slice will be one-tenth of the pizza. We can show this using decimal place, which is a dot or a period that we put between the whole number and the parts or pieces. In this case, we would write 0.1 to show that one slice is one-tenth of the pizza. If we wanted to show that two slices are two-tenths (or one-fifth) of the pizza, we would write 0.2.

Decimal place helps us make sense of numbers that have parts or pieces. We can use it to add and subtract numbers with different values, and we can use it to compare numbers that are very close together. For example, if you have two candy bars, one that weighs 0.3 ounces and another that weighs 0.5 ounces, you can use decimal place to see that the second candy bar is bigger than the first one by 0.2 ounces.

So, the next time you see a dot or a period between numbers, remember that it's called decimal place and it helps us show parts or pieces of a number!