With the first one, take the denominator (The 8), and multiple it time the whole number (The 1). Add this to the 7, and put it over the Denominator you originally had. 3/4=6/8, right? You just multiply top and bottom by the same factor, and you get 6/8. You want this to be the sameas the number you are adding/subtracting. So, the 8*1 is 8, added to 7 is 15, so 15/8. Add the 6/8 you get from the 3/4, and your finaly answer is 21/8. Rules say that the numerator cannot be larger than the denominator, so from the numerator, subtact in 8s. You can do that twice, right? So, it is 2+5/8. If it was 6/8, you'd have to simplify it to 3/4.
Multiplication to me is easier. Let's use your example.
5+3/4 is the same a 23/4, so you're somewhere.
Multiply by 1/3. Multiple both numerators (23 and 1), and both denominators (3*4). That gets you 23/12. Simplify to 1 + 11/12
To divide, you take the last number and reciprical it. Like if it is 3/4, make it 4/3. Then, follow the same procedure as multiplying.
To subtract, go about in making a common denominator, and ust subtract the 2 upper numbers.
Hope I helped! I am in Pre-Calc, so if you need any help, feel free to drop one in my inbox.
-Steven

THANKS!! i get the mixed fraction thingy part i was just confused but i learnt how to do it in school today so its all good now!!! THNX again

THE PENGUIN RULES ALL! AHAHAHAHAHAHA! *Cough*
Hello! My name is Steven, and I am a mentor. Yes, that does mean that I help other people. I have helped over 1000 people to date, and have helped some individuals for over 1/2 a year. The miracle of my life occurred 17 years ago. I say miracle only because 1/4 babies survive to be born.
I am the first born of 2 children, and I am also the black sheep. I listen to Classical Music, so you can call me a weirdo. :P. I have Obsessive Compulsive Disorder, so take no offense if my answers never seem to end.
In school, I get As and Bs. More Bs really. I play trombone, and was the section leader of the trombones at my school. This year, I am the captain of the entire brass section. I am an Eagle Scout, so I guess that says I'm persistant? You make the call. I am a 3 time varsity letter winner, looking for a 4th next winter. I also participate in the musical, where I am a Bass 2. :)
I am straight, and have never had a relationship beyond a friend. However, I have survived the bumps in the road, and can advise you if you wish it. Though, it's not my strength.
I'm here for you, and only you. That means that my advise will not always confort you. Heck, it may even scare you. Yet, I want you to do what is best for your mind. Not what is typically seen as best for you, but what YOU see best for YOU. Heck, if you wanted what was seen as best for you, you would've asked your parents what you should do. They give you what's typically best.
Alright, before I start getting tendinitis from writing that over and over again, I'll just say what I mean. I mean that if you ask me about something, let's say walking 10 miles a day, and I think it's rediculous, yet you are asking for something to do, I am NOT going to say "10 miles is the type of a thing a anorexia athletica would do. Try 5." I'll give you something to do.
Oh, and I'm a L1 moderator, which means I rate questions.

Don't hesitate to IM me, I'm usually on. If I'm not, just drop one in the Inbox!

Oh, by the way, I am liberal in everything. That means that abortion is a woman's RIGHT, and gay marriage should be LEGAL.

Ask away!
-Steven

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