If you’re struggling with teaching your students this skill, try implementing some of the tips below.
To get a free download of the templates in the video, click here.
- Have students show their work clearly and neatly
- line up the mixed numbers vertically
- require students to rewrite the problem (vertically) with equivalent fractions beside the original problem
- Simplify answers
- convert improper fractions to mixed numbers (adding the whole numbers together)
- reduce fractions that aren’t in simplest form
- Teach students the detailed steps
- When subtracting with renaming, require students to show how they add the whole that they borrowed from the whole number to the existing fraction.
- When the fractions of the mixed numbers have unlike denominators, students often add the denominators together
- When subtracting with renaming, students add 10 to the numerator of the fraction after borrowing from the whole number
- They do this because they’re used to subtracting with whole numbers, where they borrow a ten from the tens place. It’s important to have them add the whole number fraction to the existing fraction to see that one whole depends on the fraction used in the problem.
If you’re looking for resources to help your students master adding and subtracting mixed numbers, check this out.
It provides you with:
- detailed notes
- exit tickets
If you’re teaching virtually or using technology in the classroom, you can use a digital version to instruct your students. Tutorial videos are included to take your students step-by-step through sample problems and show them how to interact with the slides templates.