Tonya Said:

Math Question, adding fractions and stuff like that...?

We Answered:

1. You multiply the numerators and denominators together... ex. 1/2 X 1/2 = 1/4
2. Change the mixed number into a improper fraction and then multiply
3. Change into improper fractions and then multiply
4. Add the numerators together and then add the numbers in front of the fraction together... ex. 2 1/2 + 2 1/2 = 4 2/2 = 5
5. Change the mixed numbers into improper fractions and then the LCD. Add fractions together.
6. Change into improper fractions and then get the LCD (I think) then subtract
7. Take the number and multiply by the fraction's recriprocal: 4/1 would be 1/4
8. Flip one fraction to the recriprocal and then multiply
9. Change to improper fractions and then do the recriprocal thing and then multiply

Daniel Said:

Math help! Exponents and adding fractions, please help!

We Answered:

1. 3/x + 5/(x+4)
= 3(x+4)/[x(x+4) + 5x/[x(x+4)]
= (3x+12+5x) / [x(x+4)]
= (8x+12)/[x(x+4)]
= 4(2x+3)/[x(x+4)]

2. 9x/(x-5) - (6x+3)/(2x+3)
= 9x(2x+3)/[(x-5)(2x+3)] - (6x+3)(x-5)/[(x-5)(2x+3)]
= (18x^2 +27x - (6x^2 -27x-15)) / [(x-5)(2x+3)]
= (12x^2 +54x +15) / [(x-5)(2x+3)]
= 3(4x^2+18x+5) / [(x-5)(2x+3)]

3. f(x) = x^2 - 6x + 4

To find f(x+2), replace "x" with "x+2".
f(x+2) = (x+2)^2 - 6(x+2) + 4

I'll let you simplify it.

4. x^(-3/2) = 1/x^(3/2) = 1/[x√x]

Mathew Said:

Fractions Where to get printable worksheets???

We Answered:

Google.

Dustin Said:

Adding and Subtracting Fractions w/ Different Denominators?

We Answered:

Here's an easy way to add/subtract fractions.

Let's say you have
2/3 + 3/4

here are 3 easy steps:
1. multiply the numerator of the first addend to the denominator of the second addend.
2. multiply the numerator of the second addend to the denominator of the first addend.
3. multiply the denominators of the fractions. this immediately becomes the denominator of the sum/difference.

after doing the 3 steps, add the products of 1 and 2 and you'll get the numerator of the sum/difference.

Let's use 2/3 + 3/4 as an example
1. 2 * 4 = 8
2. 3 * 3 = 9
3. 3 * 4 = 12

therefore, 2/3 + 3/4 = (8 + 9)/12 = 17/12

now, what if you have 2/3 - 3/4?

you can still use the steps I provided

here's an example:
2/3 - 3/4 = 2/3 + (-3/4) (in the world of math, there is no such operation as subtraction. it's simply adding negative numbers)

1. 2 * 4 = 8
2. (-3) * 3 = -9
3. 3 * 4 = 12

therefore, 2/3 - 3/4 = (8 - 9)/12 = -1/12

i hope you understand.

Reginald Said:

Are the answer keys for the"Adding Mixed Numbers" Worksheets on this site correct?

We Answered:

I checked 3-4 questions on each of the worksheets in the "G" column, and everything was right. Try brushing up on your fraction addition and going back to the site - it will feel good to learn what you were doing wrong!