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quester [9]
3 years ago
5

Compare adding unlike fractions and adding like fractions

Mathematics
2 answers:
Ierofanga [76]3 years ago
7 0

Step-by-step explanation:

If you have a problem like 1 5/21 + 3 42/56 = ?

You have to find a common denominator. So you should of got 1 280/1176 and 3 882/1176. Then you add 1 280/1176 + 3 882/1176 = 4 1162/1176. Then you need to simplify the fraction. When you simplify the fraction you get 83/84. So your answer is 4 83/84.

If you have a common denominator you save your denominator and the numerator change. If you can then simplify it.

muminat3 years ago
4 0

Answer:

We just add numerators and rewrite denominator.

Adding unlike dominators:

We need to find the same denominators. You need to find the least common multiple (LCM) of the two denominators.

Step-by-step explanation:

You mean unlike denominators and like denominators.

Adding like dominators: We just add numerators and rewrite denominator :

Example : \frac{1}{4} +\frac{2}{4}=\frac{1+2}{4}  =\frac{3}{4}

Adding unlike dominators:

We need to find the same denominators. You need to find the least common multiple (LCM) of the two denominators.

For example :

\frac{1}{5}+\frac{3}{4}

LCM for 5 and 4 is 20 : Now, divide by 5 and multiply by 1 for first fraction. 20 divide by 4 and multiply by 3 :

\frac{1*4}{20} +\frac{3*5}{20}=\frac{4}{20} +\frac{15}{20}=\frac{19}{20}

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The answer to number 1 is c the answer to number 2 is c

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2 years ago
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Can someone help me with this question please.
Daniel [21]
For part A. 0.85

For part b. 11.9


Explain


Cost of each track in album A= total cost downloading album a/ total number of track


The problem give us a has 11 trackers and the total cost of download is 9.35 pounds


9.35/11

= 0.85


Now we are given each track cost in album b cost the same as track on A

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7 0
3 years ago
Jessica is shopping for a sweater the one she wants is 30%off she estimated the sale price by multiplying the original price by
Butoxors [25]
Multiplying 0.7 by the original price will work...

If you divide the cost by 100, subtract 30 from 100, you will be left with 70% times the 1/100
70% is also expressed as 0.7, since 7/10=70/100

Hope this helps!

8 0
3 years ago
What is the answer for both of these questions? I really need help
joja [24]

Answer:

thats what your brain is for

Step-by-step explanation:

3 0
2 years ago
Which algebraic expression is equivalent to the expression below?
Anarel [89]

Answer:

A. 4x²+20x+25

Step-by-step explanation:

Because of PEMDAS, you calculate the value inside of the parenthesis first, so you expand [2x+1-(4x+6)]:

2x+1-4x-6 = -2x-5.

Then apply the exponent:

(-2x-5)² = (-2x-5)(-2x-5) = 4x²+10x+10x+25 = 4x²+20x+25

4 0
2 years ago
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