**Year 3 Maths – Read and Write Numbers up to 1,000** *KS2 Revision*

## What you need to know

**Things to remember:**

- When writing numbers between 21 and 99 we use a hyphen “-“, like fifty-seven.
- We don’t write the “zero” unless 0 is by itself.
- A number in the hundreds only has three digits!

There are lots of rules that tell us when we should and shouldn’t write numbers using words, so it is important for us to learn how we do this. Let’s see how we write a number in words.

We will look at two methods for writing 426.

**Method 1 – Place value**

We can use what we learned about places values before. The 6 just means “six”, but the 5 actually means “fifty”, and the 4 means “four hundred”. So, if we put this all together, we have **four hundred and fifty-six**. But, what would happen if there was a 0 instead of a 5? Would we say “zero tens”? No! We can ignore it, so 406 would just be **four hundred and six.**

**Method 2 – Write how you speak**

If we were to read this number out loud, we would say “**four hundred and fifty-six**”. After reading it out, all we have to do is write it how we said it.

We might also have to go the other way though, changing words into numbers. So, how would we write something like “six hundred and twenty-four” in numbers”? Well, it’s quite nice really, we are told we have “six hundred” (600) and “twenty-four” (24). If we remember that “and” just means we are adding, we can write it like this:

600 + 24 = 624

Giving you a quick answer of 624!

## Example Questions

**Question 1:** Write 309 in words.

Three Hundred and Nine.

**Question 2: **Write seven hundred and eighteen in numbers.

300 + 18 = 318

The answer is 318.