Comparing in preschool — a parents guide

Being able to compare quantities is one of the foundations of mathematical thinking. A child who understands "more" and "less" has the groundwork laid for addition, subtraction and later operations. You can teach this without any pressure — through everyday conversations.

Age milestones

Age 3: understands the ideas of "many" and "few", can point to the bigger pile when the difference is obvious (for example, 1 vs. 5).
Age 4: reliably compares two groups up to 5 items, when arranged visibly side by side. Can say "there is more here" and "less here".
Age 5: compares groups up to 10 items, understands "the same amount". Starts comparing abstract numbers if a visual aid is provided.
Age 6: compares numbers up to 20, uses < and > with help, and can compare without a physical match (for example, "is 7 more or less than 9?").

Three steps to teach comparing

Start with a big difference: 2 apples vs. 8 apples. The child sees immediately where there are more.
Gradually shrink the gap: 4 vs. 6, then 5 vs. 6. Builds careful counting.
Try equality: 5 vs. 5 — so the child learns that "the same" is also a valid answer.

The pairing principle

The strongest tool for explaining comparison is one-to-one matching. Place two rows of items side by side:

⚪⚪⚪⚪⚪⚪
⚪⚪⚪⚪

The child sees the top row has "extras" — that's where there are more. This works even before the child can count.

Everyday situations to practise

At the table: who has more broccoli, me or my brother?
In toys: do we have more blocks or more soft toys?
Getting dressed: how many socks and how many shoes? Is it the same?
Outside: does this tree have more leaves than that one?

Common pitfalls

The child compares by "size", not by count. Three large apples can look like "more" than five small ones. Show one-to-one pairing, which only counts items, not their size.
Layout confuses them. Five blocks in a pile can look like fewer than five blocks scattered. Solution: arrange both groups in the same shape (a row or a circle) and count.
They can show which side has more, but cannot name it. That's fine. Teach the words "more", "less", "the same" gradually through repetition in everyday context.

Helpful games

Dot cards: place two cards on the table — which has more dots?
Egg carton: who filled more cups?
Online exercises like Compare balls and Compare numbers train the written digits too.

When to seek professional advice

If, just before starting school, your child still cannot tell where there are more even with an obvious difference (for example, 2 vs. 6), it's worth talking to a child psychologist. Sometimes it's a small visual perception issue that can be easily trained.

And remember — at this age, the most important thing is that comparing feels calm and fun.