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1/3 + 1/4   =

4/12 +  3/12 =

7/12

Hey, livelove.....let me show you a quick trick for adding fractions whose denominators are different and whose numerators are 1

Add the denominators....then... multiply the denominators.....then...put the first over the second.....

So...for the above...we have

3 + 4   = 7    and   3 * 4   =12     so we have

7 / 12

You'd have to find the LCD again. Both denominators have the lowest multiple of 12 (4*4 is 12 and 4*3 is 12). Multiply the numerators by the number the denominators were multiplied by (1*3 and 1*4). The final equation would be 3/12*4/12=7/12. 7/12 of the flowers were either yellow or white.

OK

1/5 + 3/10       getting a common denominator, we have

2/10 + 3/10   = 5/10   = 1/2

So 1/2 of the plants have been watered.

First, you would need to make the denominators equal by finding the LCD (least common denominator).  Since 10 is the lowest multiple that the denominators have in common, that would be the new denominator. 5*2 is 10 and 10*1 is 10. Since you multiplied the 5 by 2, you would need to the same for the numerator, 1. 1*2 is 2, and the new fraction would be 2/10. 2/10 plus 3/10 is 5/10, simplified to 1/2. That means that the groundskeeper watered half of the plants.

You can use the site's calculator if needed, which can be accessed by clicking on the logo on the main forum screen or the "home" tab. -72/8 is the same thing as 72/8 and adding a negative symbol, thus making 9 (72/8) in -9.

His link might help:

First, you would have to make the mixed number, 15 3/4, to an improper fraction, 63/4. You would multiply the whole number by the denominator, and add the product to the numerator, in this case 15*4+3 being 63. Then you would multiply by 5. 5 is the same as 5/1, and to multiply fractions, you have to multiply the numerators together to find the new numerator, and vice versa with the denominators. 63*5 is 315, and 4*1 is 4, therefore making the answer 315/4. Finally, you simplify to 78 3/4.

-8/8 plus 8 would be 7 since -8 divided by 8 (division is the same as fractions) is -1, and -1+8 is 7.

on the line were you put in the problem, you will see at the end the word "scientific", click on that and it will show multiple options, click on "fractions".

That looks nice, Melody.

So do I

So do I

So do I

What a clever baba :)

15*15=225

that is the number of tiles

$${factor}{\left({\mathtt{360}}\right)} = {{\mathtt{2}}}^{{\mathtt{3}}}{\mathtt{\,\times\,}}{{\mathtt{3}}}^{{\mathtt{2}}}{\mathtt{\,\times\,}}{\mathtt{5}}$$

Yes i just did this on the web2 calc on the home page.

It can do lots of cool  things :))

20/107*100

there is a calc on the home page. :)

You just keep factorising till you can go no further.

144

=2*72

=2*2*36

=2*2*6*6

=2*2*2*3*2*3     they are all prime

=2*2*2*2*3*3

$$=2^3*3^2$$

$$\\\frac{d}{dx} (4sinx)^3cosx-4sinx(cosx)^3\\\\
=3(4sinx)^2*4cos^2x\;+\;-sinx(4sinx)^3-[4cosx(cosx)^3+12sinx(cosx)^2*-sinx]\\\\$$

$$\\=12*16sin^2xcos^2x-64sin^4x-[4cos^4x-12sin^2xcos^2x]\\\\$$

And you can simplify it   

"less  than" is <

"not less than" is   $$\not <$$         So just a crossed out less than sign.