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# Do you need to add whole numbers when subtracting fractions?

Updated: 8/20/2019 Wiki User

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Q: Do you need to add whole numbers when subtracting fractions?
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Yeah banana

### When do you need to find the least common multiple for two or more numbers?

When you are adding or subtracting unlike fractions.

### When subtracting or adding numbers in scientific notation why do the exponents need to be the same?

This is effectively the same as lining up the decimal points when adding or subtracting ordinary decimal fractions.

### How is subtracting fractions like adding fractions?

You need a common denominator for both.

### Do you need a common denominator when subtracting fractions?

yes you should use a common denominator when subtracting with fractions, it makes it much easier.

### What is the difference between subtracting with regrouping in whole numbers and subraction with regrouping in fractions?

We look at the signs of numbers when we need to combine them. We subtract only if numbers have different signs, otherwise we add them. So that, if we have in an expression several positive and negative numbers, we prefer to group numbers with the same sign and add them in order to subtract just once. While with fractions we like to group fractions with the same denominator first, and after that we can combine all fractions by finding their LCD.

### What is the LCM of one half?

You need at least two numbers to find an LCM. And they need to be whole numbers, not fractions.

Yes

Yes.

### When adding or subtracting fractions you need to?

Find a common denamonator.

### When would you need to know what LCM is?

When you are adding or subtracting fractions.

### Why would you need to use LCM?

When you are adding or subtracting fractions.