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.
if you have mixed numbers you make them into improper fractions before you multiply
First change the mixed numbers into improper fractions by multiplying the denominator and the whole number and add the product to the numerator in the mixed numbers and then multiply the numerators and the denominators and divide the numerator by the denominator of the product.
First you change them into improper fractions. Then you multiply the numerator and the denamanator straight across. ;)
It's much easier to multiply fractions than it is to multiply mixed numbers. Try either one some time.
It helps with adding and multiplying fractions sometimes. Its simpler to multiply 3/7 x 9/7 than 1 2/7 x 3/7.
if you have mixed numbers you make them into improper fractions before you multiply
you have to turn them into improper fractions before you multiply them.
First change the mixed numbers into improper fractions by multiplying the denominator and the whole number and add the product to the numerator in the mixed numbers and then multiply the numerators and the denominators and divide the numerator by the denominator of the product.
First you change them into improper fractions. Then you multiply the numerator and the denamanator straight across. ;)
Change each mixed fraction to an improper fraction. Do this by multiplying the denominator by the whole number next to the fraction and then adding the numerator to the product you get. Once you do this, multiply fractions normally.
Convert them to improper fractions and proceed the same way you would multiply two fractions.
It's much easier to multiply fractions than it is to multiply mixed numbers. Try either one some time.
Convert the mixed number to an improper fraction and proceed normally.
It helps with adding and multiplying fractions sometimes. Its simpler to multiply 3/7 x 9/7 than 1 2/7 x 3/7.
Convert them to improper fractions and proceed. The answer will be positive.
The question is ambiguous. Do you want to know how to multiply a fraction by a whole number, as well as by a mixed number? Or are you asking how to multiply a whole number by a mixed number and express the product as a fraction? Or what?
No. The commutative and associative laws are valid for any real numbers.