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When multiplying fractions if the denominators are the same do they cancel each other out example 38 x 58?
Wiki User
∙ 16y ago
No, demnominators do not cancel when multiplying fractions. This is a very common mistake students make when they do fractions. In your question, the denominator is 1 for both 38 x 58 because you can see this as: 38/1 and 58/1. The 1s will not cancel. However, this will be different if your question was "what is 38 x 1/58?". This is the same thing as saying 38/58. You can simplify this one by finding a common factor.
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∙ 16y ago
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How do you cancel out fractions?
Step 1 Copy the original problem down. Check to see if it is a multiplication or division problem.Step 2 Multiply by the inverse in a division problem. For instance, 3/4 divided by 1/2 would need to be changed to 3/4 times 2/1. Whenever you divide fractions, you always flip the second fraction and change the problem to multiplication.Step 3 Look at the numerators and denominators. Decide if there are any common factors, or numbers that you can evenly divide into both the numerator and denominator. For instance, in 3/4 times 2/1, the 2 and the 4 have a common factor of 2.Step 4 Divide the numerator and denominator you have chosen by the common factor. In the example, you will have 3/2 times 1/1. On your paper you will cross out the number you have and put the new number that you get when you divide by the common factor.Step 5 Multiply numerators together and multiply denominators together to get your answer. In this problem the answer is 3/2.Step 6 Reduce your answer or make it a mixed number if needed. In the example the answer would be 1 1/2. Proper canceling will make it so that you do not need to reduce your answer. However, you may need to make it into a mixed number.Step 7 Remember that you can cancel more than once. For example, if you are multiplying 25/32 times 24/30, you will get to cancel several times.Step 8 Start canceling by dividing the 32 and the 24 by 8. This will give you 25/4 times 3/30. Then divide the 25 and the 30 by 5, giving you 5/4 times 3/6.Step 9 Divide the 3 and 6 by 3. It does not matter that these digits are found in the same fraction. This will give you 5/4 times 1/2. You cannot cancel the 4 and the 2 because they are both denominators.Step 10 Multiply and reduce or simplify your answer. The answer is 5/8, which cannot be simplified.
What is 46.3 percent as a fraction?
46.3% = 46.3/100 But you can't have decimals in fractions so you multiply them both by 10 and you get: 463/1000 which does not cancel down.
Why is the quotient of two negative integers is positive?
because when multiplying or dividing two negatives equal a positive. Let me try to explain it using words and an example from everyday life. Imagine you say "I am not going to school." The not is a negative and means you are not going! Now say "I am not not going to school." Since there are two nots they actually cancel each other out and in this sentence. It is called a double negative. Your first not is actually cancelling out your second not which then makes you say that you are going to school. This is the same idea in math when multiplying and dividing. When you have two negatives they cancel each other out do not count just like in the "not not" idea. if this makes no sense i am sry. its the way how i was taught in 8th grade to under stand double negatives and it made sense to me.
What is a fraction that has a fraction in the numerator or the denominator or both?
This is a complex fraction. Remember the 'slash' line in fractions means 'divide'. So if we have an example such as 1/2/3/4. We can separate with out by writing (1/2)/(3/4) ; note the use of brackets for clarity. Now the rule for division of fractions is invert the denomination(right hand) faction and proceed as for multiplication of fractions/ Hence 1/2/3/4 = ( 1/2) / (3/4) = > 1/2 X 4/3 Cancel down by '2' 1/1 X 2/3 = 2/3 The Answer to '1/2/3/4'. Amother example/ 2/3/4/9 = (2/3) /(4/9) (2/3)/(4/9) => 2/3 X 9/4Cancel down by '2' 1/3 X 9/2 Cancel down by '3' 1/1 x 3/2 = 3/2 '3/2' is an Improper (top heavy)Fraction and becomes 1 1/2 as a mixed number. Hence 1 1/2 = 2/3/4/9 Hope that helps!!!!
What percent is 27 out of 123?
Expressed as a percentage, 27/123 x 100 = 21.95121 percent.
How do you multiply fractions with variables?
In order to multiply fractions with variables, factor all numerators and denominators completely. Use the rules for multiplying and dividing fractions, cancel any common factors, and leave your final answer in factored form.
What do you do to add fractions with common denominators?
To add fractions with the same denominators, simply add together the numerators, and cancel down if necessary. For example, 5/8 + 1/8 = 6/8. Cancelling this down to an improper fraction in its simplest form, this is equal to 3/4.
Adding mixed numbers with unlike denominators?
First convert the mixed numbers into "top heavy (or "improper) fractions". Now multiply each of the improper fractions by each other - this makes the denominators the same. Now you can add both the fractions together (and cancel down if necessary).
How do you multiply rational algebraic expression?
Multiplying Rational Expressions After studying this lesson, you will be able to: * Multiply rational expressions. Steps to multiply a rational expression: 1. Cancel numerator to denominator if possible (don't cancel parts of a binomial or trinomial) 2. Factor the numerators and denominators if possible. 3. Multiply straight across - remember, you don't need a common denominator to multiply fractions (or rational expressions). Example 1 Nothing will cancel. Nothing will factor. All we have to do is multiply. This is the simplified answer. Example 2 We can do some canceling and reducing in this problem. 2 and 16 reduces; 9 and 3 reduces, reduce the variables. Now, we multiply. This is the simplified expression. Example 3 We can reduce 12 and 3 and reduce the variables Now, factor the second denominator. Cancel the identical binomials (x + 5 ) This is the simplified expression. Example 4 Factor Cancel the identical binomials. This is the simplified expression. Example 5Factor Cancel the identical binomials. This is the simplified expression. THIS WAS MADE BY: www.algebra-online.com/multiplying-rational-expressions-1.htm Hope this helped !
How do you multyplt fractions?
You multiply the numerators of both fractions, and place the result in the numerator of the result. Similarly, the denominator of the result is the product of the denominators of the individual fractions. For example: 2/3 x 3/7 = (2x3) / (3x7) = 6/21 You can simplify the result in the usual way. However, it is usually simpler to simplify before doing the actual multiplication. In the above example, you can cancel (eliminate) the 3 in the numerator with the 3 in the denominator before doing the actual multiplication.
How do you divide mixed numbers with like denominators?
Written as improper fractions, divide the numerators (converting any resulting improper fraction to a mixed number if required).However, I would rather not remember this short cut as it could result in being used inappropriately (when the denominators are different), but instead stick to using the standard method, writing out the calculation in full and cancelling down before doing the actual multiplications.The same way as mixed numbers without like denominators:Convert the mixed numbers into improper (top heavy) fractions.Invert (turn upside down) the divisor.Multiply the fractions together (by multiplying the numerators together and the denominators together).However, with the same denominators, in inverting the divisor it will mean that its numerator is the same as the denominator of the [original] dividend and so will cancel, leaving the result as the numerator of the first improper fraction over the numerator of the second - dividing the improper fractions' numerators.
How do you become an expert at multiplying fractions?
It is quickest to cancel first. In 4/7 x 5/8 we can cancel the 4 and 8 making 1/7 x 5/2 = 5/7 If nothing will cancel, simply multiply top two numbers for numerator and bottom two for denominator.
Does every rational function have an asymptote?
No if the denominators cancel each other out there is no asymptote
How do you divide rational algebraic expression?
Algebraic fractions, like fractions in arithmetic, are divided by inverting the second fraction and then multiplying. Example: (8x^2/3)/[6x^3/(3x - 12)] Step1: Change to a multiplication example; (8x^2)[(3x -12)/6x^3] Step 2: Factor; (8x^2)[3(x - 4)/6x^3] Step 3: Cancel common factors; 4(x -4)/3x
How do you divide a fraction by a fraction that is already being divided by a fraction?
To Divide Fractions: Invert (i.e. turn over) the denominator fraction and multiply the fractions Multiply the numerators of the fractions Multiply the denominators of the fractions Place the product of the numerators over the product of the denominators Simplify the Fraction Example: Divide 2/9 and 3/12 Invert the denominator fraction and multiply (2/9 ÷ 3/12 = 2/9 * 12/3) Multiply the numerators (2*12=24) Multiply the denominators (9*3=27) Place the product of the numerators over the product of the denominators (24/27) Simplify the Fraction (24/27 = 8/9) The Easy Way. After inverting, it is often simplest to "cancel" before doing the multiplication. Cancelling is dividing one factor of the numerator and one factor of the denominator by the same number. For example: 2/9 ÷ 3/12 = 2/9*12/3 = (2*12)/(9*3) = (2*4)/(3*3) = 8/9 Source: www.aaamath.com
When multiplying mixed numbers how do you do a cross cancel?
someone help me on mathh)"
How can you cancel down fractions?
By dividing the numerator and denominator by their HCF
