Rise and Shine 3rd-5th Math Lesson: 2021 ATOY Susanna Post- Adding & Subtracting Fractions Have you ever tried to add or subtract fractions that have different denominators? It’s tricky, right?

When adding or subtracting fractions, you need to look at the denominator. If the denominator is the same, then you can just add or subtract the numerator. If the denominator is different, then ...

In adding and subtracting fractions with unlike denominators, you have to get a least common denominator which is exactly like the least common multiple it just so happens to be in the denominator.

Addition and subtraction were the most common responses, with more than half of math teachers indicating their students can perform those operations. Roughly 3 in 10 said their students had not ...

She gave the example of the “butterfly” method of adding and subtracting fractions, which relies a multiplication trick to find a common denominator.

On standard fraction addition, subtraction, multiplication, and division problems with equal denominators (e.g., 3/5+4/5) and unequal denominators (e.g., 3/5+2/3), 6th and 8th graders tend to ...