Tiny Explorers · Ages 2 to 4
Part Whole Circle Fill
Split a whole into two parts and write the missing part. Five levels of printable part-part-whole practice with answer keys.
The learning journey
Every activity is one step. Here is where this one fits.
- PlayLearn the idea in a game
- Practise(you are here)Lock it in on paper
- ReviewCome back and keep it sharp
- MasterTake on a harder challenge
- AchieveEarn a certificate
About Part Whole Circle Fill
Part-part-whole is the single most useful picture in early number work, because it holds addition and subtraction in one place: a whole at the top, two parts beneath it, and the understanding that the parts make the whole and the whole breaks into the parts. Every item on this page shows that diagram with the total filled in, one part filled in, and one part left empty for the child to complete. There is no plus sign and no minus sign anywhere on the sheet, which is deliberate — the relationship comes first and the notation comes later. Totals are capped by level, starting comfortably within five and reaching ten at the higher levels. The missing part is never zero and never the whole amount, because both of those are technically correct number bonds that teach a young child nothing. Each level prints as an A4 page in black and white and downloads with its own separate answer key. The matching on-screen game is Part Part Whole Boxes, which uses the same diagram with draggable counters.
Common questions
- Why are there no plus or minus signs?
- The relationship between the parts and the whole comes first. The notation is easier to learn once that picture is secure.
- Can the missing part be zero?
- No. Zero and the full amount are both technically correct bonds, and neither teaches a young child anything, so both are excluded.
- How large do the totals get?
- They start within 5 at the Easy level and reach 10 at the higher levels.
- Is an answer key included?
- Yes. Every level downloads with its own separate answer key PDF.
A hand for grown-ups
- Before you start
- Have something countable nearby. Being able to check "3 and 2 really is 5" by counting builds trust in the maths.
- While they work
- If a sum is hard, suggest counting on from the bigger number rather than counting both from one. It is a real strategy, not a crutch.
- Afterwards
- Try one together out loud, talking through how you worked it out. Hearing an adult think aloud is genuinely useful.
- Watch out for
- Counting both numbers from one every time. Nudge gently towards "start at the bigger one and count on".
- Away from the screen
- Add up small shopping items, or dots on two dice. Board games with dice are addition practice in disguise.
Where to go next
Chosen by the skills this activity practises.