How to add fractions

 

A: Firstly to add fractions the denominators have to be the same.

For example, 3/7 + 2/3

firstly you need to work out the lcm of 7 and 3, in this case it is 21.

So each fraction needs to be put into the form a/21 + b/21

For the fraction 3/7, you are timsing the 7 by 3  to get 21, so you also need to times the numerator by leaving you with 9/21 which = 3/7 

Then starting with 2/3, to get a denominator of 21, you need to times 3 by 7, so you also need to times the numerator by leaving you with 14/21 which =2/3

Finally to add the 2 fractions 9/21 + 14/21 = 23/21

Other examples for you to try..

1) 3/5 + 2/3

2) 3/5 + 6/20

 

Answered by Jennifer L. Maths tutor

3558 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve the simultaneous equation: x+2y=8 and 2x+y=10 - using a calculator


Solve the simultaneous equations 3x+2y=13 and 4x+y=14


Given that 7/9 = 0.77777777 (recurring) convert 0.27777777(recurring) into a fraction. Give your answer in the simplest form.


What is Pythagoras' Theorem and how do I use it?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy