Imagine you have five candies. You can put these candies into one big block of five. This block of five looks like one big candy, but is made up of five smaller candies.
Now, let's say you have ten candies. You can make two blocks of five. These two blocks of five are like two big candies, but made up of five smaller candies each.
When we talk about blocks of five, we are basically just grouping things into groups of five. It helps us count more easily when we have a big number of things to count.
We can use blocks of five for different things, like counting how many people are in a group or how many books are on a shelf. It makes our counting faster and easier because we can just count the blocks of five instead of counting each individual thing one by one.