Multiplying Fractions
Many students consider multiplying fractions as being easier than adding and subtracting
fractions. The reason is because you do not have to find a common denominator. When you
multiply two fractions, you multiply the numerator times the numerator and the denominator
times the denominator. Simplify your answer if possible.
Let’s Practice.
If you are asked to multiply a fraction by a whole number, put the whole number over 1, then
multiply straight across. Let’s try it.
Before multiplying straight across, you must change mixed numbers to improper fractions.
Let’s practice.
Cross Simplifying
Before multiplying fractions, you can check to see if any numerator can be simplified with any
denominator. You can use cross simplification. Below are examples.
Let’s Practice.
A Few Challenges
1. Let’s try multiplying 3 fractions. Remember to cross simplify if possible.
2. You may sometimes see the word of in a problem. When you need to find part of a
number, you multiply. Remember this: “Of means multiplication.”
3. Next, let’s try a couple of word problems.
Let’s put it all together now. Refer to the chart in your notes if you need help.