need help with fractions for my son
132098
I have seen dozens of math sites on the web, and yes not all are free, but they are there.  Google it out.
126773
Yes, I can solve them.\n\nLike any other fractions, find a common denominator.  Though with (a) you can just multiply everything by 7x and simplify the equation to:\n\n21 + 1 = -14x\n\nYou can do the same with (c).  With (b) it's a little more complicated, and you have to find the common denominator of x and (x + 6).  I'll leave that for you.
536448
You find the fraction of a fraction by multiplying the top numbers and (separately) multiplying the bottom numbers.\n\nTherefore, the answer is 1/3 x 1/8, or 1 x1 over 3 x 8.  1 x1 = 1, and 3 x8 = 24, so you wind up with 1/24.\n\nWhen I first learned how to do this, I wanted to divide rather than multiply.  But you multiply the fractions, and, as I said, top numbers go with top numbers and bottoms with bottoms.  Good luck!!
508381
To multiply fractions, fundamentally the answer is the product of the numerators (top numbers) divided by the product of the denominators (bottom numbers).  For example,\n\n(2/3) * (3/7) = (2*3)/(3*7) = 6/21\n\nWhen any of the fractions contain whole parts such as the "4" in your problem, it does slightly complicate it.  Let me show you 2 slightly different ways to deal with this situation, you pick the one you like:\n\nYour problem can be rewritten as\n\n(4 + 2/7)*(8/11) =\n\n[4 * (8/11)] + [(2/7) * (8/11)] =\n\n(32/11) + (16/77) =\n\n224/77 + 16/77 =\n\n240/77\n\nOr you can do this shortcut, which converts the "4" to "elevenths" - multiple it (the "4") by the denominator (7) then add the numerator (2).  4*7 = 28, plus 2 = 30.  This will be your new numerator.  Now the problem looks like:\n\n(30/7) * (8/11) =\n\n(30 * 8)/(7*11) =\n\n240/77\n\nGet it?
630103
Instead of dividing, multiply the first fraction by the RECIPROCAL of the second. (Flip the second one over.)\n\n(7/12)(3/4) = (21/48) = (716)\n\nthis gives the same result as dividing and is much easier.
477304
What you want to do is factor out the same values from the numerator and denominators.  \n\nThe order in which you factor these out does not matter, the key is to continue to factor them out until there is nothing else to factor out.\n\nFor example you can factor out a^8 by turning it into:\n\n36 * (a^8) * (b^4) * 1/2\nover\n27 * (a^8) * a * (b^6) * 1/3\n\nsince (a^8) over (a^8) = 1 you can cancel them out leaving you with:\n\n36 * (b^4) * 1/2\nover \n27 * a * (b^6) * 1/3\n\nwe do the same factoring for b where we can factor out a (b^4):\n\n36 * (b^4) * 1/2\nover \n27 * a * (b^4) * (b^2) * 1/3\n\ncanceling the (b^4)s we get:\n\n36 * 1/2\nover\n27 * a * (b^2) * 1/3\n\nYou can then further reduce the fraction by multiplying out the 36 * 1/2 and the 27 * 1/3:  leaving you with:\n\n18\nover \n9 * a * (b^2)\n\nAs you can see now you can factor out a multiple of 9 leaving you with:\n\n2\nover\na*b^2
488293
use long division \n\ni cant do it online but the answer i got was..\n\n3x^2-4x + (16x+3 / 3x+2) <----- thats a fraction btw \n\nthe fraction is a remainder of the division.
431514
First change them to improper fractions to do this multiply the whole number by the denominator so in 3 and 7/8 you would take 3 times 8, once you got that you would add it to the numerator so\n\n3x8=24\n7+24=31\n\nso you have 31/8 for the first fraction\n\nrepeat this step for the second\n2x10=20\n20+9=29\n\nthe second is 29/10\n\nNow you must fine the lowest common denominator for both fractions, which means find a number both 8 and 10 divide into evenly. Both go into 40 evenly, so you want the denominator to be 40 on both fractions, to do this multiply the top and bottom of each so that the denominator is 40 so for the first fraction, 31/8 you would multiply both the top and bottom by 5.\n\n(31/8)x5=155/40\nand the second fraction\n(29/10)x4=116/40\n\nnow you can subtract them\n\n(155/40)-(116/40)=39/40
491810
Da*n guys! give her a break. he's EIGHT years old. He's not going to know the / sign yet. she was asking for the old fashioned division symbol. jeez...\n\nAnyway,\n   scroll through all the menu's and look for symbols...it should be in there. it'll take a lil more time having to do that but oh well. Or you could teach him the /...he'll need that for HS anyway.
15701
There are two ways.\n1.  Find an equivalent (equal) fraction with a denominator of 10, 100, 1000, 10,000 etc.\neg.  7/40 = 175/1000 = 0.175\n(Divide 1000 by 40 and if this is a whole number then use 1,000 as the new denominator and multiply the answer (1000 divided by 40 = 25) with the numerator. 7 times 25 = 175.)\n\n2.  Divide the numerator by the denominator.\neg. 7 divided by 40 = 0.175\n\nAnswers for you to check:\n1/16 = 0.0625\n5/32 = 0.15625\n9/64 = 0.140625\n87/50 = 1.54\n273/250 = 1.092\n\nWhen the numerator is bigger than the denominator the answer will have whole numbers and sometimes decimals.
342328
One method is using fractions.\nFirst, you must convert both terms into fractions:\n3/4 = 3/4\n37 = 37/1\n\nNow you multiply:\n3/4 x 37/1 = 111/4\n(Remember: to multiply fractions, just multiply across the top and bottom.)\nNow simplify:\n111/4 = 27 3/4 or 27.75\n\nAnother method is by decimals.\nChange both terms to decimals:\n3/4 = 0.75\n37 = 37\n\nNow multiply:\n37 x 0.75 = 27.75\n(Remember: to multiply decimals, set it up like a regular multiplication problem (so like 37 x 75) but at the end move the decimal over as many times as the original decimal is. (so here you have to move it over twice.))\n\nThus you arrive at the answer both ways being: 27.75 (or 111/7 or 27 and 3/4)
378888
Hi Dena Lisa.  To add these fractions you need to generate a common denominator - you can only add fractions with a common denominator.  28 is the lowest common denominator so:\n\n1) multiply 5/7 by 4/4:  this gives:\n     20/28\n\n2) multiply 3/4 by 7/7: this gives:\n     21/28\n\n3) add 20/28 to 21/28: this gives:\n     41/28\n\n4) 41/28 cannot be reduced, so the final answer is 41/28 (which is the same as 1 13/28).\n\nHope this helps you.  Best wishes and good luck.
51938
the fraction is 190046141/500000000. I'm sure your teacher will accept a decimal unless stated otherwise. For the future, whenever you need to calculate the fraction form of a decimal, just count how many digits the number has call that number k. Then write the number on top of a 1 followed by k 0s. Then you can simplify by dividing common factors.
298328
change into improper fractions\n\n3x4+3/4  divided by 8x1+1\n\n15/4 divided by 9/8\n\nreciprocate (flip) one and multiply\n\n15/4 times 8/9\n\n120/45\n\n8/3 or 2 and 2/3
155335
http://www.nist.gov/dads/HTML/squareRoot.html\nhttp://www.math.com/students/calculators/source/square-root.htm\n\nI hope it will help
423481
First, ignore those negative signs for now, and calculate each mixed fraction as an improper fraction.\n\nThe technique:  denominator times whole number, plus numerator, while keeping the denominator.\n\n6 1/6 = 37/6  (6 x 6 = 36, plus 1 = 37)\n2 2/9 = 20/9  \n\nNow, add the negative signs and solve normally\n\n-37/6 - 20/9\n\n-111/18 - 40/18\n(-111-40)/18 = -151/18
343146
Convert both #s to only fractions:\n\n16/3  x  13 / 6\n\nMultiply the numerators and the denominators:\n\n(16 x 13) / (3 x 6)\n208 / 18\n\nThen simplify:\n104 / 9\n11 5/9