Make the denominator the same, and whatever you times the denominator by, also multiply the numerator by. You add the two numerator numbers and you’re left with the top half of your fraction over your common denominator.
It seems fairly easy to do, but we’ve got a quicker, more visual approach: The butterfly method.
Scroll up and follow the method above.
Do you have any other maths hacks? Tell us and we could share it with our readers?