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.
When dividing you multiply by the inverse of the second fraction. Divide the Rational Expressions You can only Reduce when Multiplying Divide the Rational Expressions You can only Reduce when Multiplying Definition of Complex fraction A fraction with fractions in the numerator or denominator. How to simplify a Complex fraction Remember fractions are division statements.