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Updated: 4/28/2022 Wiki User

11y ago

If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify. shanshan Jiang

Lvl 10
2y ago   Wiki User

11y ago

When adding unlike fractions, find the lowest common denominator, convert them to like fractions and proceed with the addition.   Earn +20 pts
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Still have questions?  Related questions

### What is the definition of adding and subtracting fractions with unlike denominators?

What is the definition of Adding and Subtracting Like Fractions

### What types of problems can be solved using the the LCM?

Anything having to do with adding or subtracting unlike fractions.

### How is adding like fractions and adding unlike fractions the same?

If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.

### What problems can be solved using gcf and LCM?

Finding the LCM will make adding and subtracting fractions easier.

### Does the denominator have to be the same when adding a fraction?

When adding two or more unlike fractions, yes.

### What must you do first before adding or subtracting unlike fractions?

you must make the fractions equivalent and with the same denomenator

### When can you use common multiples and factors?

Use the LCM when you are adding and subtracting unlike fractions. Use the GCF when you are simplifying fractions.

### Adding and subtracting unlike fractions steps?

first u find a common denominator

### How do you solve a fraction problem when you don't have the same denominator?

If you are adding or subtracting unlike fractions, convert them to equivalent fractions with a common denominator.