X Tables
Early Years Maths

Estimating small amounts

Guess, check and discuss quantities without expecting perfect answers.

Quick answer

Estimating small amounts means making a good guess about how many things there are, without counting them all. It's like looking at a jar of sweets and saying "I think there are about 20", then checking to see how close you were.

Learning outcome

By the end of this page, you will be able to make good guesses about small amounts of things and check if your guess was close. Success signs:
  • You can look at a group of objects and say about how many there are
  • You can use words like "about", "around", or "nearly" to describe your guess
  • You can check your guess by counting or comparing with other groups
  • You can talk about whether your guess was too big or too small

Why this matters

Estimating small amounts is useful in everyday life. When you're at the shop, you might guess how many apples are in a bag. When you're playing a game, you might guess how many points you'll score. Estimating helps you think quickly and make good decisions. It's also a helpful skill for bigger maths later on, like working with larger numbers or understanding how much space something takes up.

How it works

Estimating small amounts is about using your eyes and thinking to make a smart guess. Here's how:
  1. Look at the group of things
  2. Think about how many there might be
  3. Use words like "about", "around", or "nearly" to say your guess
  4. Count or compare to check if you were close

Examples you can see

Let's imagine you're looking at a small group of toys. Here are some ways to estimate:
  • Example 1: You see 8 toy cars lined up. You say, "I think there are about 8 cars." Then you count and find there are exactly 8. Your guess was perfect!
  • Example 2: You see a pile of 12 crayons. You say, "I think there are about 10 crayons." Then you count and find there are 12. Your guess was close but a bit low.
  • Example 3: You see a group of 5 stickers. You say, "I think there are about 15 stickers." Then you count and find there are only 5. Your guess was too high.

Try it as a mini adventure

Adventure: The Magic Estimating Box You are a detective in a magic shop. There's a box with lots of small toys inside. Your job is to guess how many toys are in the box, then check your guess.
  • 1st time: Look at the box and guess how many toys you think are inside
  • 2nd time: Write or draw your guess
  • 3rd time: Open the box and count the toys
  • 4th time: Compare your guess with the real number
  • 5th time: Say if your guess was too big, too small, or just right
Try this with different boxes or groups of things around your home.

Common mistakes

  • Mistake: Thinking you have to get the exact number right. Why it happens: Some children think estimating means being perfect. Fix: Estimating is about making a good guess, not getting it exactly right.
  • Mistake: Not using words like "about" or "around". Why it happens: Children might not know how to describe a guess. Fix: Practice saying "I think there are about 10" instead of "I think there are 10".
  • Mistake: Guessing very high or very low numbers. Why it happens: Children might not have a good sense of how small amounts look. Fix: Practice with smaller groups first, then try bigger ones.

Parent and carer guide

Parents and carers can help by:
  • Practicing estimating with small groups of items at home
  • Using words like "about", "around", and "nearly" in daily conversation
  • Encouraging children to say their guesses before counting
  • Not worrying if the guess isn't perfect
  • Letting children check their guesses by counting
In just 5-10 minutes, you can:
  1. Find a small group of things (like buttons, coins, or toys)
  2. Ask your child to guess how many there are
  3. Count together to check
  4. Discuss if the guess was close
Don't focus on getting the right answer. Focus on the thinking and the fun of guessing!

Practice questions

  1. How many pencils do you think are in this box? Answer: About 10
  2. How many blocks do you think are in this tower? Answer: About 15
  3. How many crayons do you think are in this small box? Answer: About 8
  4. How many marbles do you think are in this jar? Answer: About 12
  5. How many stickers do you think are on this page? Answer: About 6

FAQ

What does it mean to estimate?

Estimating means making a smart guess about how many things there are without counting them all.

Why do we estimate?

We estimate to make quick decisions, to check if our guesses are close, and to practice thinking about numbers.

Is estimating the same as guessing?

Yes, but estimating is usually more thoughtful than just guessing. It uses your sense of how much something looks like.

How can I get better at estimating?

Practice with small groups of things. The more you try, the better you get at making good guesses.

Can I use estimating with big numbers too?

Yes! Estimating is useful for big numbers too, but we start with small amounts to build your skills.