# Visual Estimation

Visual Estimation is finding a value that is **close enough** to the right answer.

- We are
**not**trying to get the**exact**right answer - What we want is something that is
**good enough**(usually in a hurry)

### Example: How many objects are here:

We could count them, but what if we don't need an exact answer, just one that is close enough?

Have a go! Try to make a quick guess how many.

Answer: 48

As well as looking, we should also be thinking.

### Example: If the small box has an area of "1" what is the area of the big box?:

Try "measuring by eye" the width and height, then multiplying ... what do you come up with?

Answer: About 7×4 = 28

## Estimating Counts, Lengths and More

It is a **very useful skill** to be able to estimate how many things we see, or how long something is or how big something is, and so on.

Examples:

- How much wrapping paper do you need to wrap a large box?
- How much bread do you need to make sandwiches for all your friends?
- How many people in the room?
- How thick should you make each slice of cake at a party?
- How much paint do you need to paint a wall, or table?

## Experience

Knowing the usual size of things can also help.

And there is also a special trick to Estimate How Far Away.

## Games

Being good at this takes **practice and experience**.

So there are the Estimation Games to help you get started!

(Have fun!)