Home learning focus
In today's lesson, you will learn about significant figures and how to estimate.
This lesson includes:
- a learning summary
- two videos
Created in partnership with Sparx.
Significant figures show how important each digit in a number is when you want to know its size.
Significant figures - integers
For integers, identify the significant figures from left to right.
When rounding a number to a significant figure, you end up with an approximate value for the number. This can be useful when estimating the answers to difficult calculations.
Now, watch this video from Sparx to find out how to round integers to a given significant figure.
Significant figures - decimals
Rounding decimals to a given significant figure is very similar to rounding integers, but there is one important difference.
For decimals, leading zeros are not significant.
Significant figures - Integers
Have a go at this worksheet from Sparx on rounding integers to one or two significant figures. You can print it out or write your answers on a piece of paper.
There's more to learn
Have a look at these other resources around the BBC and the web.