--- title: "Working with Large Numbers" description: "Solve number and practical problems involving reading, writing, ordering, comparing, and rounding whole numbers up to 1,000,000" canonical: https://lightmysky.com/learn/mathematics/working-with-large-numbers-mt_xMt1TLTs-- source: https://lightmysky.com/learn/mathematics/working-with-large-numbers-mt_xMt1TLTs--.md retrieved: 2026-10-19 --- > **Agent view.** This is the Markdown twin of the page, for tools and assistants. > When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md > API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md > Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt > Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json > Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`. # Working with Large Numbers Solve number and practical problems involving reading, writing, ordering, comparing, and rounding whole numbers up to 1,000,000 Subject: Mathematics · Area: Number Representation & Place Value · Ages 9 to 10 Page: https://lightmysky.com/learn/mathematics/working-with-large-numbers-mt_xMt1TLTs-- ## Ready when they can - What is the largest six-digit number with digits summing to 15? - A stadium holds 67,450 people. Round to the nearest thousand for a news report - Order the populations of five cities and find the difference between the largest and smallest ## Lesson: Comparing and Ordering Large Numbers You already know how to read big numbers and round them. Now you will compare numbers to see which is larger, and put a group of numbers in order from smallest to largest. To compare two big numbers, first count the digits. A number with more digits is always bigger, no matter what those digits are. If the digit counts match, compare digit by digit starting from the left. The first spot where the digits differ decides which number is bigger. *(drawing: Look at the bars. Which town has the most people, and which has the fewest?)* **Example.** To build the biggest six-digit number with digits that add to 15, put as much of that sum as you can into the leftmost digit. Try 9 first: that leaves 6 for the rest, so the next digit can be 6, and the last four digits become 0. The number is 960,000. **Tip.** You already know how to round. Use that skill whenever a big number needs to sound simpler, like turning a stadium crowd of 67,450 into about 67,000 for a headline. **Recap.** Count the digits first, then compare from the left until you find a difference: that tells you which large number wins. ## Practice 16 questions on this page, each with its working shown. ## Needs first - [Rounding Large Numbers](https://lightmysky.com/learn/mathematics/rounding-large-numbers-mt_5NwqN6pf_A) - [Reading and writing numbers (age 9+)](https://lightmysky.com/learn/mathematics/reading-and-writing-numbers-age-9-mt_JwP9QFv6gQ) ## Opens up - [Numbers to ten million](https://lightmysky.com/learn/mathematics/numbers-to-ten-million-mt_XNmGwNggdU)