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How do you add and subtract unlike positive and negative fractions?
Wiki User
∙ 11y ago
-1/2+7/10
Wiki User
∙ 11y ago
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Do you add and subtract like and unlike fractions in the same way?
no, to add and subtract like and unlike fractions the denominator has to be the same,
Is a negative subtract a negative a positive?
Yes. A negative subtracted by a negative is a positive. Just remember that two like signs become a positive sign, and two unlike signs become a negative sign.
What problems can be solved using gcf and LCM?
Finding the LCM will make adding and subtracting fractions easier.
What are the steps to subtract unlike fractions?
first find a common denominator then subtract the top numbers
What is a situation where you would use LCM?
To add and subtract unlike fractions.
When do you use LCM in math?
When you want to add or subtract unlike fractions.
Why do you have to turn unlike fractions into like fractions to add or subtract?
because its just one of the rules of math :)
How do you subtract fractions without alike denominators?
Convert unlike fractions to equivalent fractions with common denominators by finding the LCM of the denominators.
How to subtract like and unlike sign?
well, if it is a negative plus a positive, it would be much like subtracting backwards, like this: -4+7=3 or -11+7=-4 also, if it is a positive plus a negative, you subtract 4+(-7)=-3 or 11+(-7)=4
Why do you need to use common denominator?
To get the right answer when you add or subtract unlike fractions.
When you add or subtract fractions with unlike denominators why do you have to find LCM?
Because to add fractions, the denominators must be equal.
Why do fractions need to have unlike denominator before you add or subtract them?
The question is based on a complete misunderstanding of what is required. Unlike denominators are NOT required!
