How to Add and Subtract Fractions… With Pizza! By Frank Wang

Pizza You all love pizza, don’t you? With pizza, you can learn a new math skill! FRACTONS!

Do this What is 1/3 plus ½? Let’s try it with pizza. 1/3 1/2 + = 5/6

Walkthrough Let’s go through that with the actual numbers now that you understand what to do with pizza. First, make the denominators the same. The only way to add and subtract fractions is to have the same denominator for both fractions. 1/3 = 2/6 (1x2=2, 3x2=6) ½=3/6 (1x3=3, 2x3=6)

Walkthrough 2 Then, add the NUMERATORS and NOT the DENOMINATORS. This is because the denominators are how many pieces the whole is split into, and you aren’t splitting it up more. 2/6 + 3/6 =5/6

Subtracting Fractions It’s the same with subtraction with fractions. Make the fractions have the same denominator and then subtract the numerators and keep the denominator. ½ - 1/3 =? ½ = 3/6, 1/3=2/6 3-2=1, so the answer is 1/6

Review Do you understand now? Good. Try this question. 3/5 – 1/2

Answer If you got 1/10, great job! If you got something different, here is how I got that. 3/5 = 6/10 ½= 5/10 (3x2=6,5x2=10) (1x5=5, 2x5=10) 6-5=1, so the answer is 1/10

Thank You for Participating! EVERYTHING BY FRANK (except the methods)