we can use the number line as a model to help us visualizeadding and subtracting of signed.
no, to add and subtract like and unlike fractions the denominator has to be the same,
You add all the numbers with + signs and subtract all that have minus signs.
By the signs: 2+2(Add) 2-2(Subtract) +=add -=subtract
You would have to convert the units to be alike, then you would be able to add and subtract them.
just change the fration with the smallest denominator and add or subtract the way you always do.
To add two integers with unlike signs: -- Find the difference between their sizes, ignoring their signs. -- Give the difference the sign of the integer with the larger size.
To add and subtract unlike fractions.
When you want to add or subtract unlike fractions.
To get the right answer when you add or subtract unlike fractions.
Because to add fractions, the denominators must be equal.
-1/2+7/10
The question is based on a complete misunderstanding of what is required. Unlike denominators are NOT required!