Dividing Fractions [CC] – Civil Service Exam Review

Dividing Fractions [CC] – Civil Service Exam Review


Hi, there thank you for checking out my channel. Thank you for clicking on this video. This video is part of the series of videos I post to try to help people out when it comes to aptitude tests like the civil service exam UPCAT, LAE, Philsat and all of those things. Today is part of our Math Monday series, in which I try to help you out by discussing 1 math topic every Monday. So if this is the first video that you are watching from this channel, don’t forget to hit subscribe and hit the bell icon for you to know as soon as a new video is posted because I make a lot of these videos every week. So, thank you guys. To all who share this channel to your friends, I appreciate that a lot because my real goal is to build a bigger community of learners so we can help more people with the exams to achieve their dreams. This is part of the revamped series on fractions. Today we are going to talk about dividing fractions. So, if you haven’t seen the other parts of the series click here to catch up It is better if you are equipped with that as you face this next video. So if you haven’t seen it, hit paus, then get back to me, okay? But if you have, let’s go ahead and talk about this. In order for me to explain it better, I’m going to switch over to my, PC so I can show you how to do it. I’ll see you in a bit. Alright, let’s talk about dividing fractions. The rule is this, you can only work with fractions It’s the same rule for multiplication because in fact dividing is just the opposite of multiplication. Now, what is the process? It’s like this, if you have fractions like these All you have to do is to change it into multiplication and flip the second fraction. Here, it’s 2 over 3 divided by 1 over 6. But it will turn into 2 over 3 times You’ll switch these so the 6 will go up over 1 Okay, so this becomes 2 times 6 you just need to match it That same on what we do in multiplying fractions which i discussed in an earlier video 2 times 6 is 12 over 3 So the answer here is going to be 4 Okay, that is your answer and again if you mastered our guessing or guesstimation on the last video, you’ll get what is the correct answer here if in case you have options It gets harder if you already have mixed numbers like these. These are mixed numbers and that’s what we are going to talk about in detail here, So this is the explanation, this is the same problem which I flashed earlier on the screen. We will do this step by step. The first is to convert them into improper fraction so that is what we are going to do here 2 times 3 plus 2. So 6 plus 2 is 8 over 3 divided by 3 times 6 which is 18, plus 1 which makes 19 over 6 Next step, we’re going to flip the second fraction over and then of course we are going to multiply it so 8 over 3 times then switch this 6 over 19 Okay, next thing we’re going to do is to match and multiply. So again, both of them and both of them we have 48 over 3 times 19 which is going to give you 57 okay and then I will convert it into mixed number or transform it into its lowest terms if we could. If not, that will be the final answer, but in this case since they are both divisible by 3 and I know that because of my video on GCF if you haven’t watched it, please watch so you will be faster in this part, okay? I will divide it by 3, that will give you 1 and then 16 over 19 okay, 16 over 19 you cannot do anything since they don’t have common factor so this is your final answer Just practice and practice, with practice, this should be so natural with you the more that you do it and it’ll make sense if this will be easy for you because this was discussed during your elementary years, but just refresh yourselves so you’d be faster if you have a booklet, answer them, okay? So this is our quick quiz on dividing fractions, and if at Any point you find this too hard or too difficult to go ahead and go back to the video lesson, ok? But i’ll give you 3 minutes to answer your these 3 problems and your timer starts now Alright, let’s see how. You did okay right so the first problem here 8 over 9 divide By 1 over 4. So again first thing we’re going to do is to flip it over so 8 over 9 times (we are going to flip it) this will be 4 over 1 so this will be 8, 16, 24, 32 over 9 and since there is no common factors here, all we need to do is to convert it into a mixed number so how many 9s are there in 32 What you could do would be 32 divided by 9 or if You are comfortable with your numbers you should already know that 9, 18, 27 are the nearest so there are 3 27 so 32 minus 27 is 5 so you have 3 and 5 over 9. so that is your answer. In the second question, you have 4 over 5 divided by 2 and 1/4 again What are we going to do is turn them both into fractions. so 4 over 5 and then I will convert this into improper fraction 2 times 4 is 8 plus 1 is 9 so it will become 9 over 4 and then for it to be multiplication I will switch this side 4 over 5 time and then switch 4 over 9 Then after that, I can start to solve it, so match, match we have 16 over 5×9 is 45 And since I can’t think of more factors there is no possible factors that becomes my Answer we cannot divide this to 2, 3, 4 and itself So that is my answer. 16 over 45 okay, I hope you got that right. Now, next Number three, here they are both mixed numbers so again same thing we will convert it first 4 times 5 is 20 plus 4 that is 24 over 5 Divided by, again 1 times 3 plus 2 that is 5 over 3 then for it to be multiplication we will switch the other one so 24 over 5 times the opposite of this which is going to be 3 over 5 so 24 times 3 is 60 plus another 12 so that is 72 Over 5 times 5, which is 25? So the answer here will be two 25s which will make 50, right? So we have 2 and then 72 minue 50 which is 22 over 25 since they don’t have common factor, that becomes my answer Okay? If you got confused about what I did here, you can just make it simple i just divided it like what I did before. I just used mental math. That is why I am fast because I didn’t have to write anything at all. So again, I hope you got that right. Just be careful on converting and multiplying because if you multiply it without flipping the other number, you will get the wrong answer. Alright! I hope you learned something today If you did click, thumbs up Make sure to share this video with your friends especially if they will also take an exam so we can help more and if you want to get a copy of the reviewers that i made including the workbook, where you can see exercise on this topic, you can go to www.facebook.com/teamlyqa to find out how how you can get your own copy. There are upcoming live review events and the online review program and all the resources that I have is there in the page. So if you want to join us, you can go to that page for more information. Thank you guys for watching. Never stop learning! Aja! Aja! You can do it! I’ll see you on my next video and bye for now

Comments

  1. Post
    Author
    Adrian Alex

    Hi Ma'am! Thank you sa mga videos mo ma'am laking tulong sakin. I passed the comex csc sub pro exam yesterday! Thank you ma'am!

  2. Post
    Author
  3. Post
    Author
  4. Post
    Author
    SeΓ±o Rita

    Thanks you maam … Bec. Of ur videos … Narereview po ung utak ko sa math … Hanggang sa panaginip nagsosolve ako ng math… 😘😘😘😘More power maanlm

  5. Post
    Author
  6. Post
    Author
    ryan pelaez

    Andito na ko sa room for the exam! Hahahaha. Pampa refresh lang for the last time! Goodluck august 12 2018 cse takers!

  7. Post
    Author
  8. Post
    Author
  9. Post
    Author
  10. Post
    Author
    Charm Ai

    Thank you po. You are so mabait and generous to share your knowledge. Super dami ko natutunan sa mga vids mo about Math. God bless you po.

  11. Post
    Author
    Jamila Baclig

    Paano po nakuha yung sa 72/25? Bakit po naging 2 22/25? help po, tama po ako sa question 1 and 2, yung 3 lang po hindi ko nakuha yung dulo na part

  12. Post
    Author
  13. Post
    Author
  14. Post
    Author
  15. Post
    Author
  16. Post
    Author
    Quennie Morales

    I almost downloaded all your videos for my review and my exam is in3 days from now already. Huhu
    But still, thank you for sharing your knowledge πŸ™‚ you are blessed! 😍

  17. Post
    Author
  18. Post
    Author
    Sean Naes

    I'm doing a marathon of all of her videos here, very helpful to refresh different topics since elem. I'm a taker of cse this Aug 2019, sana makapasa! πŸ˜€

  19. Post
    Author
    Yoo Mi

    Maam lyqa instead of flipping the 2nd fraction bakit hindi mo tinuturo yung technique na cross multiplication na lang? Kahit sa ibang teachers dito sa yt di rin tinuturo. Just curious maam lyqa.

  20. Post
    Author
  21. Post
    Author
  22. Post
    Author
    Xyza Dacanay

    thankyou Maam Lyqa 3/3 mas mabilis kong nage gets pag kayo po nag e-explain 😊 Godbless po. πŸ˜‡

  23. Post
    Author
  24. Post
    Author
  25. Post
    Author
  26. Post
    Author
    Hazel Campos

    Math mondays are great. She is good. The only thing i disliked was the way she talked. Maybe she could try to talk a lil bit slower and clearer. πŸ‘

  27. Post
    Author
  28. Post
    Author
    Ederlinda Pobar

    Very thankful for the Math made easy uploads. I am helping my grandniece with her assignments abd these uploads helped me a lot to refresh my memory as I am already a senior citizen. Thank you!

  29. Post
    Author
  30. Post
    Author
  31. Post
    Author
  32. Post
    Author
  33. Post
    Author

Leave a Reply

Your email address will not be published. Required fields are marked *