Representing numbers to 1000
Identify, represent and estimate three-digit numbers using different representations: place a number on a 0–1000 number line marked only in hundreds or unmarked, estimate the value of a marked point, and represent a number with base-ten blocks (hundreds, tens and ones), a place-value chart and a drawing, including numbers with a zero digit and non-standard partitions
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Representing numbers to 1000 means practising the idea at the table with counters or paper models and one clear check. We will demo once, then your child tries.
Materials: Place-value cards or columns (hundreds/tens/ones); Digit cards 0–9. Adult builds 243 and names hundreds, tens, ones. Child builds three numbers and names each place. Done: three numbers built with correct place names. Stop after the fresh check; keep optional challenge for another day.
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Illustrative Mathematics · Practice link — not the full lesson
Counting Stamps
Before you open · source notes
Counting stamps supports representing numbers toward 1000 with hundreds, tens, and ones. Not every fraction model.
Free, no sign-in. A teacher solution is on the same page, so use the student view with your child.
Before you openAsk the learner to show a three-digit total with hundreds, tens, and ones.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public Illustrative Mathematics task page. The .html address responds HTTP 308 to this URL. An anonymous GET of this URL on 2026-11-12 returned HTTP 200 with no login or payment prompt. Where a teacher solution is present, it is on the same page as the student task; this check did not find a separate locked student view. An adult can use the student view section and should not read a solution aloud. Advertising was not observed in the fetched HTML text; that is not a browser, device, or ad-free guarantee. This is a paper or discussion task, not an automatically marked interactive game. Opening the link does not save practice or assess mastery. Diagrams on the page use missing or filename-only alt text, so they are not an accessible image equivalent. Accessibility still depends on an adult describing the picture.
Illustrative Mathematics. “Counting Stamps.” Licensed CC BY-NC-SA 4.0. External task; Gakuva does not copy, host, embed, or redistribute it.
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Check understanding
- Mark 346 in about the right place on a 0–1000 number line marked in hundreds (between 300 and 400, a little before halfway), and estimate that an unlabelled point three-quarters of the way along is about 750
- Represent 507 with physical or on-screen base-ten blocks and on a place-value chart, showing the empty tens column as 0
- Match a drawing of 3 hundreds, 14 tens and 2 ones to the numeral 442
“If your child sees a number line from 0 to 1000 marked only in hundreds, can they point to roughly where 346 goes — and show 346 another way, such as hundreds, tens and ones blocks or a place-value chart?”
Curriculum record
- Type
- Representational
- Subject
- Mathematics
- Domain
- Number Representation & Place Value
- Age range
- Ages 7–9
Standards