Multiply straight across and cross reduce when necessary
When you add or subtract fractions you cross multiply and when you multiply or divide fractions you across multiply.
Cross-multiplying is when you have two fractions, and you multiply the numerator of each fraction by the other fractions's denominator. In other words, if you have two fractions a/b and c/d, cross-multiplying would be finding a*d and b*c. If a/b=c/d, then ad = bc.
When doing fractions, you may cross multiply.
When cross multiplying, finding the product of the means and extremes, you are technically getting a common denominator that reduces out.
Two fractions are equivalent if the fully simplified fractions are equal. If you can multiply the fraction with the smaller numerator and denominator by the same value to equal the second fraction. For example the fractions 3/4 and 9/12. The nominator and denominator, 3 and 4 have both been multiplied by 3 to equal 9/12. Cross multiply. If the products are equal, the fractions are equal. Cross multiplying means to multiply each numerator of one fraction with the denominator of the other fraction.
You do not need to.
to order fractions you can cross multiply two fractions at a time or you can convert all the fractions into decimals.
To divide fractions, turn the second one over - that is, swap its numerator and denominator - and multiply. Nothing else is necessary. You cross multiply when you have a proportion, that is when you have two ratios that are equal.
Change the fractions to the same denominator then compare.A quick way is to multiply UP on cross multiply and compare.
You look at the fractions sideways. Lets say that you had 3/4 and 2/3 and you were multiplying them. Put them on paper. Now you can see that 4 and 2 are compatible. What you do is: Cross out the four and put a 2. This means 2 goes into 4 twice. Then cross out the 2 and put a 1. This means that 2 goes into 2 once. Now you just multiply. Hope that answered your question!
you have to cross multiply of coarse!
6/7 of 217
if youre dealing with fractions then you multiply top by top and bottom by bottom then simplify
Cross multiplication is when you multiply the denominator of a fraction by the numerator of another fraction. Before you cross multiply you want to see if you can simply the fractions.
There are places where this term is used. 1st- to compare fractions across an equals you are multiplying each side by the product of the denominators. It looks like you multiply the numerator of the left side times the denominator of the right and put that product on the left side. Multiply the numerator of the left times the denominator of the right and put that on the right. In algebra this is good when looking for an unknown. 2nd- when comparing fractions to see which one is bigger you can multiply up from the denominator to the other numerator and compare these numbers to see which one is bigger.
More than that. You need to multiply the whole number, the farctions AND cross multiply the whole numbers and the fractions. Then add together all the answers. Thus, 23/4 * 56/7 = 2*5 + (3/4*6/7) + 2*6/7 + 3/4*5 Actually, it is far simpler to convert the mixed fractions to improper (top heavy) fractions, and then multiply the numerators together to give the numerator of the answer and multiply the denominators together to give the denominators of the answer.
Cross canceling is a way to simplify or reduce fractions before multiplying them. For example, 2/4 x 1/6 can be reduced to 1/4 x 1/3 by cross canceling.
1. They are equivalent fractions.2. They cross-multiply to the same value (a/b = c/d if and only if ad = bc).1. They are equivalent fractions.2. They cross-multiply to the same value (a/b = c/d if and only if ad = bc).1. They are equivalent fractions.2. They cross-multiply to the same value (a/b = c/d if and only if ad = bc).1. They are equivalent fractions.2. They cross-multiply to the same value (a/b = c/d if and only if ad = bc).
easy, just cross multiply