How do you find common denominator for mixed numbers like 1/6+3/9 ?

Answer 1

List prime factors
6 = 2 * 3
9 = 3 * 3
count twins only once, and then all other numbers

so, least common denominator is 2 * 3 * 3 = 18

Answer 2

The easiest way would be to multiply the fraction by the other fractions denominator. You may have to simplify in the end, but I think this is the easiest way.

For example:
1/6 + 3/9
Multiply 1/6 by 9 so 9/54
Multiply 3/9 by 6 so 18/54

9/54 + 18/54 = 27/54
Now to simplify, divide the numerator and denominator by the same number to simplify.
For this problem, the easiest divisible number to see immediately would be 9.
27 divided by 9 = 3
54 divided by 9 = 6

3/6 can be simplified still to 1/2.

Answer 3

1/6 and 3/9

here 3/9 can b further simplied to 1/3..so that you work is much easier and you can find the answer to ur solution quicker...

so now u have 1/6 and 1/3

here the denominators are 6 and 3...so from the tables of 6 and 3 you should find a number thats common in both of the tables....so you get 6 how??

you know
3 x 2 = 6
1 x 6 = 6

so in 1/6 ...'6' is already ur denomiator.... and in 1/ 3 you need the denominator to b '6' so 3 x 2 =6

so, 1/3 times 2 in the numerator and denomiator gives you
2/ 6


there fore,
1/6 + 2/6= 3/6
which can b further simplified to 1/2

Answer 4

You multiply the two denominator 6X9 which equals 54.. Multiply the one in 1/6 by 9 which would equal 9/54 and multiply 3 by 6 in the 3/9 which would equal 18/54 then add 9/54 + 18/54 to get 27/54 to reduce 27/54 would be 1/2

Answer 5

With something like that you want to make sure that you have the fraction reduced and then you find the multiples of each denominator

1/6 is reduced
3/9 redices to 1/3

multiples of 6=6, 12, 18, 24, 30, etc...
multiples of 3=3, 6, 9, 12, 15

Then you find the lowest match, which in this case is 6...and you have to multiply 3 by 2 to get 6 so 1/3x2/2=2/6

Answer 6

you find a common denominator by getting a factor that agrees for both numbers

6=2x3
9=3x3
2x3x3=18

1/6=3/18 and 3/9 would become 6/18
3/18+6/18=9/18==reduced to 1/2

Answer 7

1/6 reduced is 1/6.
3/9 reduced is 1/3.
The common denominator is 6 so it would be 1/6 and 2/6.

I think, good luck!

Answer 8

you times both numbers on the left side by the denominator on the right and do the same for the right side, it will give you the same denominator

1/6+3/9

1x9/6x9 + 3x6/9x6 =9/54+18/54