ACARA AC9MFN03, Count and compare collections to 20

Foundation · Number

Count to find how many are in collections of at least twenty, compare them, and explain or show the reasoning behind which has more or fewer.

Below are free printable maths worksheets that support AC9MFN03. Print them as PDFs, or generate a fresh one. Every maths answer key is computed in code, so it is never wrong.

Teach this code

Deliver a whole lesson on AC9MFN03 from a textbook-grade teaching unit, with a hook, worked examples, diagrams, misconceptions, and an exit ticket.

Counting to tell how many

Kindergarten (ages 5 to 6)

Counting to 100 by ones and tens

Kindergarten (ages 5 to 6)

Comparing numbers and groups

Kindergarten (ages 5 to 6)

Teaching guide

What students learn

Count to find how many are in collections of at least twenty, compare them, and explain or show the reasoning behind which has more or fewer.

How to teach it

Count real objects out loud, touching each one once, then match the count to the written numeral. Practise counting on from a number, not always from one.

Worked example

1, ___, 3, 4, 5

Answer: 2

Generated and checked in code, so it is correct.

Watch out for

Skipping or double-counting objects (weak one-to-one correspondence), and thinking the last number said is just a label rather than the total.