Looking at a scientific calculator, you’ll likely see a button that looks like this: ab<\/sup>⁄c<\/sub><\/strong>. It’s the fraction button.<\/p>\n If you enter 5ab<\/sup>⁄c<\/sub>7 + 1ab<\/sup>⁄c<\/sub>3 =<\/strong>, you’ll probably get 1r 1r 21.<\/strong> This means 11<\/sup>⁄21<\/sub>. Now press shift<\/strong> (or 2nd F<\/strong> or just 2nd<\/strong>, whichever your calculator has) ab<\/sup>⁄c<\/sub><\/strong>; you’ll see 22r21<\/strong>, which means 22<\/sup>⁄21<\/sub>.<\/p>\n The fraction button saves you from having to get a common denominator to add or subtract fractions. Therefore, using it can save a lot of effort – especially for someone who’s weak at times tables.<\/p>\n My advice: don’t use it. In high school math, you’ll encounter algebraic fractions, which the scientific calculator can’t handle. You’ll have to do them “the old way”, by hand. Therefore, this math tutor recommends keeping in touch with how to do so.<\/p>\n The fraction button didn’t exist when I was in school. I watched, fascinated, as a student showed it to me in the late 90s. Normally, I don’t use it; however, even some study guides recommend its use now. In certain contexts, I guess using it could make sense.<\/p>\n Hope this helps:)<\/p>\n