You would have to convert the units to be alike, then you would be able to add and subtract them.
no, to add and subtract like and unlike fractions the denominator has to be the same,
First you work our how much to divide multiply by ( 1000,100,10 ). Then u add or subtract the amount
just change the fration with the smallest denominator and add or subtract the way you always do.
To add and subtract unlike fractions.
When you want to add or subtract unlike fractions.
you would have to convert the units to be alike.
To get the right answer when you add or subtract unlike fractions.
we use the metric system because there would not be as much numbers and ways to add and subtract.
55 3/16-15 5/8
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!