Comparing numbers within 20 — for parents

Comparing numbers looks easy to adults, but it has some surprising tripwires for six-year-olds. Most curricula expect a first-grader to confidently compare any two numbers up to 20 and use the symbols < , > and =.

What confuses children

• Sign direction. Many children swap > and <. The hungry-crocodile picture (the wide mouth always opens toward the bigger number) sticks well, much better than verbal rules.
• Numbers between 10 and 20. Some kids look only at the second digit. They claim 14 < 9 because "4 is less than 9". Show them the number line — 14 is clearly to the right of 9.
• Equality. When the numbers match, kids sometimes still want to put < or > because they expect a "winner". Practice a few = examples on purpose.

Things you can do at home

• Stack two piles of small objects (Lego, cereal, coins). Ask "which pile has more?" then write the comparison together.
• Roll two dice. Each player shouts the bigger number.
• Use the numbers from a calendar — "Is your birthday before or after mine?" That is comparing too.
• Do a few problems each day. Five minutes is plenty.

Words you can use

It helps if the child hears the same words at home and at school. Try to use:

• "is greater than" / "is less than" / "is equal to"
• "more than" / "fewer than" / "the same as"

These match the symbols nicely and avoid awkward translations later.

Ready for more

When comparing within 20 feels routine, the next steps are ordering several numbers in a row and comparing within 100 (a 2nd-grade topic). For now, keep things playful — math at six is much more about confidence than speed.

← Worked examples