Finding 100 More or Less than a Number
Maths: Year 3 & 4 National Curriculum, topic 1.1.5
Finding 100 More or Less than a Number
When we add or take away 100 from a number, we need to focus on the hundreds column.
Find 100 more
- To add 100, we add 1 to the number in the hundreds column:
- 370 + 100 = 470
Find 100 less
- To take away 100, we subtract 1 from the number in the hundreds column:
- 370 - 100 = 270
Add 1 to 9
- Sometimes we want to add 100 and the number in the hundreds column is 9.
- To do this, change the 9 to a 0 and add 1 to the number in the thousands column:
- 4980 + 100 = 5080
Take away 1 from 0
- Sometimes we want to take away 100 and the number in the hundreds column is 0.
- To do this, change the 0 to a 9 and take away 1 from the number in the thousands column:
- 1056 - 100 = 0956 = 956
Test yourself on Finding 100 More or Less than a Number
What is 100 more than 822?
What is 100 less than 559?
A furniture shop wants to reduce the price of a sofa by £100. If the sofa cost £399 before, what is its new price?