One third plus one third equals two thirds. To understand this, let’s break it down.
When you add fractions, you need to have a common denominator. In this case, both fractions, one third and one third, already have the same denominator, which is three. You add the numerators (the top numbers) together while keeping the denominator the same.
So, you take:
1 (the numerator from the first fraction) + 1 (the numerator from the second fraction) = 2
Now, place this sum over the common denominator:
2/3
Therefore, one third plus one third equals two thirds.