How do you simplify 312+423?

1 Answer
Jul 29, 2016

Turn the mixed numbers into improper fractions, find a common denominator, and add.

Explanation:

What you have in your equation are called mixed numbers (A whole number + a fraction). We want to turn these mixed numbers into improper fractions (fractions where the numerator is bigger than the denominator), So, let's take the whole number and multiply it by the denominator, then add the numerator:

32+1=7

43+2=14

72+143

We can't add the fractions just yet, though. To do this, we need a common denominator. Let's use 6 as our denominator, since 23=6, and 32=6:

216+286

Next, we just add the fractions together:

21+28=49

216+286=496