Like fractions stay the same when you're adding related fractions . First you find common factors that would make the denominator the same so you can add them together .

For placing fractions in order you change the denominator so you can compare it easily . You also taught us how to get fractions into their simplest form . you get both fractions together & multiply or divide in a way that fits until you can't multiply or divide any more . You also taught us how you find equivalent fractions .