I need help also with checking fractions on a number line i dont get how you do it?
lets say you have 3/4. divide 3 by 4 and you have .75.
on a number line youd have *= .75. + is 0 and 1
+…………..*….+
Can someone tell me the common fractions that are taken out of a distillating column, at what temperature they are removed and a little bit about them (eg. its uses, molecular formula.)
Big reward for big answer 
Thanks in advance!
A fractional distillation column does not produce crude oil, it uses it as a raw material. The fractions that are removed will depend on the type of crude used, they are all different mixes. Typical output will include petrol, naphtha, diesel, paraffin.
The required temperature can be varied by using pressure or vacuum in the column so there will be a range for each output depending on internal pressure.
See http://en.wikipedia.org/wiki/Fractional_distillation
Martin
I am having some trouble converting these fractions into scientific notation! Please help!
1.)(1/5) to the 3rd power
2.)(2/3) to the negative 3rd power
Help please! I don’t understand!
First get them to decimal notation, then convert that into scientific notation.
(1/5)^3 = 1/125 = 0.008 = 8 x 10^(-3)
(2/3)^(-3) = (3/2)^3 = 27/8 = 3.375 = 3.375 x 10^1
I want to know how to do fractions in very easy to understand steps. Could you also explain how to use the techniques required to do fractions?
well let’s say adding fractions first.
you want a common denominator (bottom)
so let’s say you have 1/2 + 1/4
in order to get the 1/2 to have a common denominator, we multiply 1/2 by 2/2 which is the same as multiplying by one, thus preserving the value.
after this, we add the numerator (top) and keep the denominator.
1/2 * 2/2 = 2/4 + 1/4 = 3/4
for subtraction, same type of deal but just subtract the numerator.
multiplication
- just multiply the top by the top and the bottom by the bottom
1/2 * 3/4 = (1*3)/(2*4) = 3/8
division
- flip the second and multiply. say (1/2) / (4/5)
we take the 4/5 and make the numerator the denominator and the denominator the numerator (4/5 becomes 5/4)
then multiply
hope this helps
I am having some trouble converting these fractions into scientific notation! Please help!
1.)(1/5) to the 3rd power
2.)(2/3) to the negative 3rd power
Help please! I don’t understand!
First get them to decimal notation, then convert that into scientific notation.
(1/5)^3 = 1/125 = 0.008 = 8 x 10^(-3)
(2/3)^(-3) = (3/2)^3 = 27/8 = 3.375 = 3.375 x 10^1
the questions on the test are
1. Which of the following pairs of numbers contain like fractions?
2. 7 1/5 – 6 2/5 = ?
3. What is the sum of 2/5 and 2/4?
4. What is the least common denominator of 3/4, 4/5, 2/3?
5. What is the product of 3 2/3 and 14 2/5?
6. Divide 6/13 by 6/12 .
7. Jane is making a suit which requires 2 5/8 yards for the jacket and 1 3/4 yards for the skirt. What is the total amount of material she needs?
8. Which of the following is an example of a proper fraction?
9. A bus on a regular schedule takes 3 1/4 hours to reach its destination. The express bus takes 2 1/2 hours to make the same trip. How much travel time can be saved by taking the express?
10. Ralph spends 15 1/3 hours per month playing tennis. How many hours does he play tennis in a year? (There are twelve months in a year.)
11. What is the reciprocal of 6/5?
12. A family spends 1/10 of its annual income for housing, 1/4 for food and clothing, 1/5 for general expenses, and 2/15 for entertainment. What fractional part of their income is spent on these items altogether?
13. What is the fraction 18/24 reduced to its lowest terms?
14. 7/8 = ?/48
15. A chef prepared five chocolate tortes for a dinner party. The guests consumed 2 5/16 tortes. How many tortes are left?
16. Write 10 5/12 as an equivalent improper fraction.
17. Simone has 5 employees in her flower shop. Each employee works
6 4/15 hours per day. How many hours, in total, do the 5 employees work per day?
18. 15 ÷ 6 2/3 = ?
19. What is the difference between 126 1/4 and 78 2/3?
20. 4/15 of the 315 members of a book club are male. How many female members are there in the club?
but i don’t want anyone to answer these for me i want to learn how to do it myself but i have no idea what im doing T_T
It would probably be best to go and see your teacher for extra help.
2. An easy way to subtract fractions is to turn them into improper fractions (whole number multiplied by denominator. then plus numerator)
3. To add fractions, find the least common denominator, change the fractions and then add.
11. A reciprocal is when you flip the number, so ex. 3/4’s reciprocal would be 4/3 or 1 1/3. the reciprocal of 3 (3/1) would be 1/3.
I would highly recommend going to your teacher for help.
that’s basically what I need to know how to do. PLEASE. I am using a Texas Instruments TI-30. I just need to know how to do fractions with it. If some one could help me It would be greatly appreciated and i’ll award the person with best answer too! thanks.
Ok, my calculator is still in my locker, but im positive that i’ve got it down…..first you type whatever number the numerator is (top #) and then if you look around above the number pad until you find a button that says ABC on it, press it and what looks like a comma will appear then all you do is put in whatever number the denominator is (bottom #) ………..go on and press divide or multiply, then type in the second fraction using the ABC button too
Important rules to remember when adding, subtracting, multiplying, or dividing fractions!
Duration : 0:1:28
Reduce these fractions before multiplying:
5/8 x 3/10
I do not understand how to do it. The book gives lots of mumbo jumbo, can you do that problem, and explain your steps of solving it so I can follow the steps myself?
Hi! Okay. There are two explanations to this… make sure you understand reducing ONE fraction before throwing the whole multiplication thing into the mix.
Step One, REDUCE. When you reduce a fraction, you need to see if you can divide out the same number from the top and the bottom. For example, 100/100… obviously, you can divide 100 from the top and the bottom, leaving you with 1/1 or 1. Does that make sense? Next example is 2/10. Look at your top number… What numbers can you multiply together to equal 2? 1 times 2 is it, right? Look at the bottom number. 10. What numbers can you multiply together to equal 10? 1 times 10, 2 times 5… Okay, now we have numbers to work with. 2, 2, 5 and 10. There are two 2s, right? So the fraction 2/10 can be reduced. 2 divided by 2 is 1 and 10 divided by 2 is 5. Your final reduction is 1/5.
NEXT. With multiplication…
5 3
– * –
8 10
Multiplying fractions is so fun… really. If you flat out multiplied this fraction, you’d end up with what… 15/80. If you reduce everything (15… 1*15, 3*5 and 80… 1*80, 2*40, 4*20, 5*16, 8*10), you end up with 3/16. The goal is to reduce everything while the numbers are still little.
5 3
– * –
8 10
I wish I could draw this for you… when multiplying your fractions, you can reduce criss-cross-ways. So in this case, 5 and 10, then 3 and 8. Let’s look at the 5 and 10 first (5… 1*5 and 10… 1*10, 2*5). We can see that we can take a 5 out of both of those numbers, right? Divide the 5 out of the 5 and the 5 out of the ten, and you’ll get this:
1 3
– * –
8 2
See what I just did? Now let’s look at the 3 and 8. (3… 1*3 and 8… 1*8, 2*4). There are no common numbers that we can divide out of the 3 and 8. So we still have
1 3
– * –
8 2
And we’re ready to multiply.
Multiply the 1 * 3 and you have 3. Multiply the 8 * 2 and you have 16. Your final answer is 3/16. If you look at earlier when I went ahead and multiplied out the original problem, you’ll see that we just saved time and energy…
Remember that what I told you is a PROPERTY of multiplying fractions. This means that somebody really smart did some crazy calculations that say you can do this. Once you realize that you can do this with all MULTIPLIED fractions, you’re saving yourself some serious work… reducing the littler numbers before they’re multiplied and huge.
Good luck!!
http://www.teachertube.com
Fractions rap song. Top video on TeacherTube.com. Mr Duey - Fractions Official Video
Duration : 0:2:34