---
title: "Precise Maths Vocabulary"
description: "Communicate with mathematical precision: use correct vocabulary for primes, factors, multiples, angle types, and polygon regularity; specify units including cm², m³, °; use notation for squares/cubes "
canonical: https://lightmysky.com/learn/mathematics/precise-maths-vocabulary-mt_xfwv0M83mJ
source: https://lightmysky.com/learn/mathematics/precise-maths-vocabulary-mt_xfwv0M83mJ.md
retrieved: 2026-10-19
---

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# Precise Maths Vocabulary

Communicate with mathematical precision: use correct vocabulary for primes, factors, multiples, angle types, and polygon regularity; specify units including cm², m³, °; use notation for squares/cubes and percentages accurately

Subject: Mathematics · Area: Mathematical Thinking · Ages 9 to 10
Page: https://lightmysky.com/learn/mathematics/precise-maths-vocabulary-mt_xfwv0M83mJ

## Ready when they can

- Distinguish 'factor' from 'multiple' in a written explanation
- Write an area answer as 48 cm² (not just 48) and a volume estimate as approximately 60 cm³
- Use 5² notation correctly and read it as 'five squared'

## Lesson: Say What You Mean in Maths

Exact words make your maths thinking clear. Instead of 'a number that divides in,' say factor. Instead of 'a wide angle,' say obtuse angle. The right word tells everyone exactly what you mean, with no guessing.

A factor of a number divides into it exactly, with nothing left over. 2, 3, 4, 6, and 12 are all factors of 12. A multiple is what you get when you multiply a number by a whole number, so 12, 24, and 36 are multiples of 12. A prime number has exactly two factors: 1 and itself.

*(drawing: Each number here is a multiple of 4: you get every one by multiplying 4 by a whole number. 8 is 4 times 2.)*

**Example.** Zara measures a rectangle 6 cm by 8 cm and writes its area as 48 cm², not just 48. The little 2 shows the answer covers a flat, two-dimensional space measured in square centimetres.

6² means 6 squared, or 6 x 6 = 36. 2³ means 2 cubed, or 2 x 2 x 2 = 8. The small number tells how many times to multiply the big number by itself.

A box 2 cm by 3 cm by 4 cm holds 2 x 3 x 4 = 24 one cm cubes. Its volume is 24 cm³. The little 3 shows three lengths were multiplied to fill space.

**Tip.** Angles have exact names too: acute is less than 90°, right is exactly 90°, obtuse is more than 90°. A regular hexagon has six equal sides; an irregular one does not.

**Recap.** Use the exact word, like factor, multiple, prime, squared, or obtuse, and always attach the correct unit, like cm² or cm³, to your answer.

## Practice

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

## Needs first

- [Regular and irregular polygons](https://lightmysky.com/learn/mathematics/regular-and-irregular-polygons-mt_8H2kO4k2B9)
- [Square and cube numbers](https://lightmysky.com/learn/mathematics/square-and-cube-numbers-mt_gxCIASSezX)
- [Mathematical Precision](https://lightmysky.com/learn/mathematics/mathematical-precision-mt_mywsN77hGZ)

## Opens up

- [Advanced Maths Vocabulary](https://lightmysky.com/learn/mathematics/advanced-maths-vocabulary-mt_3rTIyJDw7-)