--- title: "The two digits of a two-digit number" description: "Understand that the two digits of a two-digit number represent amounts of tens and ones" canonical: https://lightmysky.com/learn/mathematics/the-two-digits-of-a-two-digit-number-mt_THl9GLxwoL source: https://lightmysky.com/learn/mathematics/the-two-digits-of-a-two-digit-number-mt_THl9GLxwoL.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`. # The two digits of a two-digit number Understand that the two digits of a two-digit number represent amounts of tens and ones Subject: Mathematics · Area: Number Representation & Place Value · Ages 6 to 7 Page: https://lightmysky.com/learn/mathematics/the-two-digits-of-a-two-digit-number-mt_THl9GLxwoL ## Ready when they can - Explain that in 47, the 4 represents 4 tens (40) and the 7 represents 7 ones - Use base-ten blocks to show a two-digit number as tens and ones - Identify the tens digit and ones digit in any two-digit number ## Lesson: Tens and ones in a two-digit number A two-digit number has two digits, and each one has a job. The digit on the left counts tens. The digit on the right counts ones. *(drawing: Twenty is 2 tens and 0 ones. Each group of ten blocks is one ten.)* **Example.** Look at 47. The 4 is in the tens spot, so it means 4 tens, which is 40. The 7 is in the ones spot, so it means 7 ones. Forty plus seven is forty-seven. **Tip.** Read a two-digit number from left to right: tens digit first, then ones digit. Swap them and you get a different number. **Recap.** The left digit tells you the tens, the right digit tells you the ones, and together they make the number. ## Practice 14 questions on this page, each with its working shown. ## Needs first - [A Ten Is Ten Ones](https://lightmysky.com/learn/mathematics/a-ten-is-ten-ones-mt_r0VXbfAmsH) - [The teen numbers](https://lightmysky.com/learn/mathematics/the-teen-numbers-mt_xmmgAzxe5j) ## Opens up - [Fluent addition and subtraction](https://lightmysky.com/learn/mathematics/fluent-addition-and-subtraction-mt_3e_PQxwC12) - [A Hundred Is Ten Tens](https://lightmysky.com/learn/mathematics/a-hundred-is-ten-tens-mt_8gy7uxRlF6) - [Representing Numbers](https://lightmysky.com/learn/mathematics/representing-numbers-mt_9L3NQqgqRd) - [Mental addition and subtraction (age 6+)](https://lightmysky.com/learn/mathematics/mental-addition-and-subtraction-age-6-mt_AKAtWEwpcj) - [The three digits of a three-digit number](https://lightmysky.com/learn/mathematics/the-three-digits-of-a-three-digit-number-mt_aPBzD28_mT) - [Using structure to calculate efficiently](https://lightmysky.com/learn/mathematics/using-structure-to-calculate-efficiently-mt_DW2D1c0fKx) - [Adding within 100](https://lightmysky.com/learn/mathematics/adding-within-100-mt_glPPG-kTQY) - [Adding and subtracting tens mentally](https://lightmysky.com/learn/mathematics/adding-and-subtracting-tens-mentally-mt_I5j1ZWo2cn) - [Place value understanding and number facts](https://lightmysky.com/learn/mathematics/place-value-understanding-and-number-facts-mt_kJGCjnuelW) - [10 More or 10 Less](https://lightmysky.com/learn/mathematics/10-more-or-10-less-mt_kw7xmp68rU) - [Counting forwards and backwards (age 6+)](https://lightmysky.com/learn/mathematics/counting-forwards-and-backwards-age-6-mt_OkSJfrmFb_) - [Comparing and ordering numbers](https://lightmysky.com/learn/mathematics/comparing-and-ordering-numbers-mt_U0waNfD8PB)