So that you can get your answer more faster and you don't need to do a lot of work
They are very helpful once you start pre-calculus (i.e. geometry, algebra and trigonometry). You use them alot when adding, subtracting, multiplying, dividing and performing complex equations.
an improper fraction
improper fraction
improper fraction
improper fraction
It is important because depending on the problem it is easier to use fractions or decimals. Sometimes the problem is asking for an exact answer, in which case you would keep it in fraction form.
To multiply fractions you take the first fractions top, or the numerator, times the second fractions top. This is the top to the answer. Then you take the first fractions bottom, or denominator, times the second fractions bottom. This is the answers bottom. 2/3*7/5=14/5 To divide fractions, you take the second fraction and flip it over. Then you continue the same way as multiplying fractions, taking the first fraction times the flipped over second fraction. (2/3)/(7/5)=2/3*5/7=10/21
It is not as helpful when multiplying very small numbers because the numbers are going to be very east to answer. That is why estimating is not as helpful when multiplying very small numbers.
it is helpful because if you become a carpenter you will know how much carpet you need or for other jobs turning mixed number into improper fractions is just helping you learn a bout mixed number even more
It can be very helpful, so the question is inappropriate.
No, you do not need to find a common denominator when multiplying fractions. To multiply fractions, you simply multiply the numerators together and the denominators together. However, finding a common denominator can be helpful when simplifying the resulting fraction.
This can be especially helpful if you are adding or subtracting fractions, so the bottom number on both fractions will be the same