# Find 1, 10, 100 and 1000 more or less

## Learning focus

Learn how to find 1, 10, 100 or 1000 more or less than a given number.

This lesson includes:

a catch-up quiz

one learning summary with slideshow

# Quiz

To get started, let's see how well you know this topic already. Take the quiz below to find out.

# Learn

When finding 1, 10, 100 or 1000 more or less than a number, place value is very important.

## Finding 1 more or less

When you are finding 1 more or less, only the **ones** column changes.

## Finding 10 more or less

When you are finding 10 more or less, only the **tens** column changes.

## Finding 100 more or less

When you are finding 100 more or less, only the **hundreds** column changes.

## Finding 1000 more or less

When you are finding 1000 more or less, only the **thousands** column changes.

The only time these rules change is when you bridge another place value, for example:

10 more than 1*89*2 is 1*90*2.

Try solving these word problems by applying your knowledge.

## Example 1:

**Charlotte counts back in thousands from 8723. Which number does she say?**

**A** - 7623

**B** - 2723

**C** - 8123

Look at the numbers carefully. Which one has the same digits in the hundreds, tens and ones, but a different number in the thousands?

It’s **B** - 2723. The other two have decreased in hundreds!

## Example 2:

Look at this sequence:

1432 | 1422 | 1412 | 1402 |

Now look carefully at each of the digits. Which place value is changing each time?

It is the tens!

1432 | 1422 | 1412 | 1402 |

The sequence decreases by 10 each time.

# Where next?

Have a look at these other resources.