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Add or Subtract 100, 10 or 1

In this worksheet, students will add or subtract 100, 10 or 1 to or from a given number.

'Add or Subtract 100, 10 or 1' worksheet

Key stage:  KS 2

Year:  Year 3 Maths worksheets

Curriculum topic:   Number: Number and Place Value

Curriculum subtopic:   Find 10 or 100 More or Less than a Given Number

Popular topics:   Subtraction worksheets, Addition worksheets

Difficulty level:  

Worksheet Overview

In this activity, we will add or subtract 100, 10 or 1 to or from a number.


When we add or subtract 100, it is the hundreds digit that we change.

When we add or subtract 10, it is the tens digit that we change.

When we add or subtract 1, it is the ones digit that we change.


Remember that other digits may have to change too.


Example 1

What number is 100 less than 750?



Reduce 7 hundred by 1 hundred to get 6 hundred...


750 becomes 650


Example 2

What number is 10 more than 539?



Increase 3 tens by 1 ten to get 4 tens...


539 becomes 549


Example 3

What number is 1 less than 539?



Reduce 9 ones by 1 one to get 8 ones...


539 becomes 538


Example 4

What number is 10 less than 405?



Here we have to be careful, because we can't reduce the tens digit by 1. 

So include the hundreds digit.

Think of it as reducing 40 tens by 1 ten to get 39 tens.


405 becomes 395


boy with question marks


That was a hard one to finish with, so make sure you've understood it before attempting the questions.

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