-1/2+7/10
no, to add and subtract like and unlike fractions the denominator has to be the same,
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.
Finding the LCM will make adding and subtracting fractions easier.
first find a common denominator then subtract the top numbers
When you want to add or subtract unlike fractions.
To add and subtract unlike fractions.
because its just one of the rules of math :)
Convert unlike fractions to equivalent fractions with common denominators by finding the LCM of the denominators.
To get the right answer when you add or subtract unlike fractions.
Because to add fractions, the denominators must be equal.
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
The question is based on a complete misunderstanding of what is required. Unlike denominators are NOT required!