Sometimes you can tell how many things there are without counting. Your eyes just know it!
Step 1: Let's Learn
Read it, or press Listen and follow the words.
A number you already know
A dice shows 5 dots. You do not count them. You just see 5.
There is a word for this.
Subitizing means seeing how many, without counting.
Seeing fast helps you add faster later. First, let’s practice seeing.
Step 2: Try It Yourself
Look fast, then say how many.
Card 1 of 5
Ready? The card shows for a moment.
How many
4 more would make 10.
Step 3: In Real Life
Playing a board game
You roll a dice. You see 5 dots. You do not count them. You just know it is 5. That is seeing it fast. Every dice game uses it.
Step 4: Watch an Example
See how one card works.
Watch Ana Play
Ana is playing one card. Here is what she does.
- Step 1
Ana taps the button. The dots flash, then hide again.
Step 5: Your Turn
Practice makes it stick.
At the Park
Problem 1 of 1
You see 3 ducks by the pond in a line, all at once. How many ducks are there?
Flash Practice
Play a few more rounds on your own. Try to answer before you feel like counting.
Card 1 of 4
Ready? The card shows for a moment.
Make What You Saw
Build it, then check.
Fill six boxes.
How many
Step 6: Quick Check
Show what you know.
Question 1 of 2
Which picture shows 4, arranged so it is easy to see fast?
Question 2 of 2
How many dots? Try to see it without counting.
What You Learned
- You can know how many without counting.
- A shape you know, like a dice pattern, is easy to see fast.
- This is called subitizing.
For the grown-up
Counting and knowing how many are different skills. A child can recite to twenty and still recount a row of six every time they are asked, because the last number said has not yet become the answer to "how many".
Watch for recounting. If they count a group, are asked how many, and start again from one, the link has not formed yet. It is extremely common at this age and is not a memory problem.
When it happens, count together slowly and then close your hand over the group and ask again. Hiding the objects is what forces the number to stand in for them.
It only works for small groups — Past about four, almost nobody can see the amount straight away. Five scattered dots have to be counted. Five dice dots do not, because you learned that picture.
Why seeing fast is worth having — Counting takes one step per object. Seeing takes one step for the whole group. That saved time is what lets you think about the problem instead of the counting.
Try it on your hand — Hold up three fingers. Do not look yet. Now glance down and look away again. How many? Three. You knew without counting. Try it with your whole hand. Five. Now try seven fingers the same way. Harder, is it not?