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โˆ™ 2014-04-22 17:23:08
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Q: Is it necessary to cross multiply when multiplying fractions?
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What is an algorithm for multiplying fractions?

Multiply straight across and cross reduce when necessary

When multiplying fractions do you multlply to the side or cross multiply?

Multiplying fractions is the easiest operation you can do with them. Nothing complicated is required, just multiply the top two and the bottom two. Simple as that!

When do you cross multiply in dividing fractions?

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.

What does cross multiplyng mean?

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.

What is the difference between cross and across?

When you add or subtract fractions you cross multiply and when you multiply or divide fractions you across multiply.

Do you cross simplify in multiplying fractions?


Do you cross multiply with fractions?


Why does cross multiplying with fractions work?

When cross multiplying, finding the product of the means and extremes, you are technically getting a common denominator that reduces out.

When do you cross multiply to solve an equation?

When doing fractions, you may cross multiply.

Do you still cross multiply when you have like fractions?

You do not need to.

How do you figure out if two fractions are equal or not?

cross multiply

How can you tell if two fractions are equivalent?

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.

How do you figure out what fractions are greater?

Change the fractions to the same denominator then compare.A quick way is to multiply UP on cross multiply and compare.

How do you figure out least to greatest with fractions?

you have to cross multiply of coarse!

How do you multiply fractions by cross canceling?

6/7 of 217

What does Cross multiplication mean?

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.

How do you you cross multiply?

if youre dealing with fractions then you multiply top by top and bottom by bottom then simplify

Could you cross multiply numerator by denominator to compare fractions?


How do you cross simplify when multiplying fractions?

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!

What is a definition for ordering fractions?

to order fractions you can cross multiply two fractions at a time or you can convert all the fractions into decimals.

What is cross canceling in dividing fractions?

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.

How does cross multiplying of fractions work?

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.

When multiplying mixed numbers do you have to multiply the whole numbers or just the fractions?

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.

How do you cross multiply fractions?

write two fractions beside each other,and start at the top right multiply that to the bottom left,and write the answer above it,and multiply the top left to the bottom right,and write the answer above the fraction.

What are the steps to comparing fractions?

cross multiply and the fraction with the largest total is a greater fraction