How to you work out sums with mixed number fractions?

Question

For example you have 3 4/5 + 8 6/7

(Three fourfifhts + Eight sixsevenths)

Answer 1

You have to work out the common denominator.

In your case make the 5 and 7 on the fraction into 35

So now times the 4 on top by by 7 and the 6 on top by 5

So you now have fraction of 28/35 + 30/35 plus the whole numbers.

So you now have 58/35 making a whole plus 23/35 remaining

So the answer is 12 and 23/35ths.

Answer 2

add 3+8=11

add 4/5+6/7=(28+30)/35=58/35=1 23/35

Then

11+1 23/35=12 23/35

Answer 3

= 3 4/5 + 8 6/7 Transform to improper fractions

= 19/5 + 62/7 Determine the least common denominator (LCD): 35

= 133/35 + 310/35

= 443/35 or 12 23/35

Answer: 12 23/35

Another way:

= 3 4/5 + 8 6/7

= 3 28/35 + 8 30/35

= 3 58/35

= (3 + 8 + 1) (58 - 35)/35

= 12 23/35

Answer 4

3 + 8 + (4 * 7 + 6 * 5) / (5 * 7) = 11 + 58 / 35

********** 58 / 35 = 1 + 23/35

11+58/35 = 12 + 23/35

Answer 5

Convert the bottom number to the same.  so if its a 5 and a 7, then do it all to 35ths.

so 4/5 is the same as 28/35 and 6/7 is the same as 30/35.  

Answer 6

Well you could add the whole numbers then add the fractions, or convert to topheavy fractions. Both ways you need to make the fractions have a common denominator.

First method:

3 + 8 + 4/5 + 6/7

=3 + 8 + 28/35 + 30/35

= 11 + 68/35

= 12 33/35

2nd way:

3 4/5 = 3 * (5/5) + 4/5 = 19/5 = 133/35

8 6/7 = 8 * (7/7) + 6/7 = 62/7 = 310/35

3 4/5 + 8 6/7 = 133/35 + 310/35 = (133+310)/35 = 443/35 = 12 33/35

Hope that helps.

Answer 7

3 28/35 + 8 30/35 = 11 58/35 = 12 23/35.

Answer 8

Its easy, either change the fractions to improper fractions then find the common denominator and then simplify the rest of sum.

Answer 9

too easy~