You are Here: Home >< GCSEs

# Need Help With Decimals watch

1. How do you know how where to put the decimal point after working out the answer? I heard it's something like count up the zeroes or something??
2. (Original post by Mia 15)
How do you know how where to put the decimal point after working out the answer? I heard it's something like count up the zeroes or something??
Its got to do with rounding the numbers and significant figures. It should be borne in mind that the first sf is not the first digit which is a zero. However, the second, third,fourth, are sf. When they follow after the 1st they are permitted to be a zero.

In simpler terms, find the last digit of the number hypothetically if you are rounding to 3sf then the 3rd sf is the last digit. Then use the digit to the right of the decider exactly like the decimal point. Once that has been completed, fill it up with zeros up to but not beyond the decimel point.

Hope I helped.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: April 16, 2018
Today on TSR

### Edexcel C4 Maths Unofficial Markscheme

Find out how you've done here

### 2,065

students online now

Exam discussions

Poll
Useful resources

## Study tools

### Essay expert

Learn to write like a pro with our ultimate essay guide.

See where you can apply with our uni match tool

### Make study resources

Create all the resources you need to get the grades.

### Create your own Study Plan

Organise all your homework and exams so you never miss another deadline.

### Resources by subject

From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

### Find past papers

100s of GCSE past papers for all your subjects at your fingertips.