fractions 13/56+5/7=? can someone help?

2008-10-24 6:05 pm

回答 (8)

2008-10-24 6:16 pm
✔ 最佳答案
13/56 + 5/7
= 13/56 + (5 x 8)/(7 x 8)
= 13/56 + 40/56
= (13 + 40)/56
= 53/56
2015-05-06 3:37 pm
answer
2008-10-24 6:24 pm
13/56 + 40/56 = 53/56
2008-10-24 6:14 pm
Lcd of 7 and 56=56
13/56+40/56=53/56
2008-10-24 6:13 pm
13/56+5/7=

times 7 by 8 so the denominator is 56 and times 8 on the numinator

13/56 + 40/56 =
= 53/56
2008-10-24 6:13 pm
53/56


13/56 + 40/56 = 53/56
2008-10-24 6:12 pm
convert the 5/7 to 56ths by multiplying by 8/8 then the rest is easy
2008-10-24 6:12 pm
To add or subtract fractions, you need all terms to have the same denominator - the bottom part.

Her you have 13/56 and 5/7

Now, 56 = 7 * 8, so we need both terms to have 56 on the bottom.

5/7 = 40/56 (multiply top and bottom by 8)

So you have
13/56 + 40/56 = 53/56

Understand? Good! ;-)


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