Skip to main content

iRubric: Adding/Subtracting Fractions rubric

find rubric

edit   print   share   Copy to my rubrics   Bookmark   test run   assess...   delete   Do more...
Adding/Subtracting Fractions 
Adding/Subtracting Fractions
The students have been working on all the concepts leading up to adding/subtracting fractions. Comparing fractions with unlike denominators, making equivalent fractions, simplifying fractions, and now adding/subtracting fractions
Rubric Code: TXBBCA7
By krist742
Ready to use
Public Rubric
Subject: Math  
Type: Assessment  
Grade Levels: K-5

Powered by iRubric Adding/Subtracting Fractions
The student has to put together all the skills they have learned to add/subtract fractions with unlike denominators.
 

1 pts


2 pts


3 pts

Find LCM of Denominators

The student is able to find the least common multiple of the fractions with unlike denominators.
1

The student does not or does not know how to find the LCM of the denominators.
2

The student somewhat understands the concept of listing the multiples of the denominators, but their work is not complete.
3

The student fully understands and lists the multiples of the denominators, showing the LCM by circling it, or making it the fractions new denominator.
Make Equivalent Fractions

The student is able to make equivalent fractions from finding the LCM of the denominators.
1

The student does not know how change the fractions to equivalent fractions with the same denominators.
2

The student somewhat understands the concept of making equivalent fraction, but their understanding is not complete. They make may the new denominator the LCM but is not sure about how to get the new numerator.
3

The student is able to make equivalent fractions from making the LCM of the unlike denominators the new denominators and then multiples the numerator by the same number they multiplied their old denominator by to get their new denominator.
Add/Subtract the Fraction

The student is able to add or subtract the fractions.
1

The student does not know how to correctly add or subtract the fractions with unlike denominators.
2

The student somewhat understands that when the denominator is different, they need to make equivalent fractions. They make an attempt to find the new numerators/denominators and adds or subtracts only the numerator.
3

The student fully understands to add the new numerators together, while the denominator stays the same, as well as adding the whole numbers.
Simplify Fractions

The student is able to put fractions in its simplest form.
1

The student does not know or does not simplify fractions.
2

The student may somewhat understand to list the factors of the numerator and/or denominator. An attempt is made to find the common factors and divide the numerator/denominator by the common factors, but the factors may not be in simplest form.
3

The student is able to list the greatest common factors of the numerator and denominator and then dividing the numerator and denominator by the GCF to come up with the most simplified version of the fraction.



Keywords:
  • Fractions

Subjects:

Types:

Discuss this rubric




Do more with this rubric:
Preview

Preview

Preview this rubric.
Edit

Edit

Modify this rubric.
Copy

Copy

Make a copy of this rubric and begin editing the copy.

Print

Print

Show a printable version of this rubric.
Categorize

Categorize

Add this rubric to multiple categories.
Bookmark

Bookmark

Bookmark this rubric for future reference.
Assess
Test run

Test run

Test this rubric or perform an ad-hoc assessment.
Grade

Grade

Build a gradebook to assess students.
Collaborate

Collaborate

Apply this rubric to any object and invite others to assess.
Share
Publish

Publish

Link, embed, and showcase your rubrics on your website.
Email

Email

Email this rubric to a friend.
Discuss

Discuss

Discuss this rubric with other members.
 

Do more with rubrics than ever imagined possible.

Only with iRubrictm.

n178