Verdict. The Microsoft Lumia 638 is an attractive budget friendly smartphone with the latest Windows OS and support for 4G LTE Cat4. It features a powerful Qualcomm Snapdragon processor but the lack of front camera is a big disappointment.
Steps. 1. Make sure that the denominators of every fraction that you're going to add or subtract are the same. 1  If the numbers are different, you can't add or subtract the fractions as-is.2  You can, however, perform the operations necessary to create fractions with like denominators, in which case you can add and subtract them.teps. 1. Make sure that the denominators of every fraction that you're going to add or subtract are the same. 1  If the numbers are different, you can't add or subtract the fractions as-is.
You simply set up the multiplication problem, like this: Then you multiply straight across, so the numerators get multiplied together, and the denominators get multiplied together. In this case, you would be multiplying 1 x 1 (the numerators) and 2 x 4 (the denominators). When complete, it will look like this: Once you get your answer, make sure it is reduced (if you can reduce it, do so; if not, leave it the way it is). Then, youâre done!