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waipahu2student
Aug 1, 2010, 11:51 PM
how do you multiply fractions? Like 1/2x3/4 and I need answers on how to divide them, add them, and subtract them. Thank you and please explain.

Unknown008
Aug 2, 2010, 12:19 AM
\frac12 \times \frac34

In multiplication, you multiply the numerators and the denominators:

\frac12 \times \frac34 = \frac{1 \times 3}{2\times 4}

If you want to divide, then you need to reverse the second fraction:

\frac12 \div \frac34 = \frac12 \times \frac43

Then, you proceed with multiplication.

In addition:

\frac12 + \frac34

The usual way around is to find the lowest common multiple of the denominators. In this case, the LCM of 2 and 4 is 4. Then, you change the fractions so that they are on the same denominator.

\frac12 = \frac24

\frac12 + \frac34 = \frac24 + \frac34

Once the denominators are the same, you perform the calculation with the numerators, that is:

\frac24 + \frac34 = \frac{2+3}{4}

Subtraction is similar. You only change the sign, like this:

\frac12 - \frac34 = \frac24 - \frac34 =\frac{2-3}{4}

Can you post what you get? :)

waipahu2student
Aug 6, 2010, 07:16 PM
Oh m gosh thank you so much I loooove you thanks I really need it its for algebra so I got an a-wesome

Unknown008
Aug 7, 2010, 12:32 AM
You're welcome :)

morgaine300
Aug 8, 2010, 01:38 AM
Is it my imagination or does that subject title say "test" in it?