---
title: "The multiples of 10"
description: "Understand that the multiples of 10 (10, 20, 30 … 90) represent one to nine tens and 0 ones"
canonical: https://lightmysky.com/learn/mathematics/the-multiples-of-10-mt_zfy1gOEewd
source: https://lightmysky.com/learn/mathematics/the-multiples-of-10-mt_zfy1gOEewd.md
retrieved: 2026-10-19
---

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# The multiples of 10

Understand that the multiples of 10 (10, 20, 30 … 90) represent one to nine tens and 0 ones

Subject: Mathematics · Area: Number Representation & Place Value · Ages 6 to 7
Page: https://lightmysky.com/learn/mathematics/the-multiples-of-10-mt_zfy1gOEewd

## Ready when they can

- Explain that 30 means 3 tens and 0 ones
- Represent 50 using 5 tens rods and no unit cubes
- Match decade numbers to their tens representation

## Lesson: Counting by whole tens

You already know that a ten is ten ones bundled together. Now count using only whole tens: 10, 20, 30, 40, 50, 60, 70, 80, and 90. Each of these numbers is built from tens alone, with nothing extra left over as loose ones.

*(drawing: 3 rows of ten make 30. There are no loose dots left over.)*

**Example.** Mia lines up 5 tens rods and no loose cubes. She counts 10, 20, 30, 40, 50. That number, 50, means 5 tens and 0 ones.

**Tip.** Look at the ones place in 30, 50, or 90. It always shows a zero. That zero is a placeholder. It means there are no loose ones, only whole tens.

**Recap.** Every multiple of ten is made only of whole tens, and the zero in the ones place shows nothing is left over.

## Practice

17 questions on this page, each with its working shown.

## Needs first

- [Counting in 2s, 5s and 10s](https://lightmysky.com/learn/mathematics/counting-in-2s-5s-and-10s-mt_nvdpxAJTBG)
- [A Ten Is Ten Ones](https://lightmysky.com/learn/mathematics/a-ten-is-ten-ones-mt_r0VXbfAmsH)

## Opens up

- [Subtracting multiples of 10](https://lightmysky.com/learn/mathematics/subtracting-multiples-of-10-mt_HJTuIGHvcR)