Because common denominators allow adding and subtracting of numerators. Improper fractions also have simplified rules over mixed numbers when performing multiplication and division.
Simplicity of calculation
if you have mixed numbers you make them into improper fractions before you multiply
First you change them into improper fractions. Then you multiply the numerator and the denamanator straight across. ;)
what is dividing fractions and mixed numebers
You change the mixed number into an inproper fraction.
Mixed numbers can be converted to improper fractions. Improper fractions can be added the same way proper fractions are.
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 you change them into improper fractions. Then you multiply the numerator and the denamanator straight across. ;)
A mixed number can be converted into an improper fraction. Mixed numbers as improper fractions can be divided just like any other fraction. To convert a mixed number to an improper fraction multiply the whole number by the denominator and add the original numerator to give the new numerator and put this over the original denominator.
Fractions and decimals are usually rational numbers. Besides, multiplying rational and irrational numbers is also similar.
what is dividing fractions and mixed numebers
You change the mixed number into an inproper fraction.
So that you can get your answer more faster and you don't need to do a lot of work
did you get this off of big ideas learning
Mixed numbers can be converted to improper fractions. Improper fractions can be added the same way proper fractions are.
Mixed numbers cannot be turned into proper fractions, but they can be made into improper fractions by multiplying the integer (# on the side) by the denominator (bottom), and then adding that number to the numerator (top).
you cant divide mixed numbers