fraction question: 3/5+3/4?
回答 (5)
2009-03-08 3:08 pm
✔ 最佳答案
= 3/5 + 3/4= 12/20 + 15/20
= 27/20 or 1 7/20
Answer: 1 7/20
Checking back to the minuend, 3/5:
= 1 7/20 - 3/4
= 27/20 - 3/4
= 27/20 - 15/20
= 12/20 or (12/4)/(20/4) or 3/5
2009-03-08 10:59 pm
12/20 + 15/20 = 27/20 = 1 7/20.
2009-03-08 10:27 pm
find a common denominator:
12/20+15/20 = 27/20 or 1 and 7/20
12/20+15/20 = 27/20 or 1 and 7/20
2009-03-08 10:25 pm
Find the least common denominator (multiple):
5 = 5
4 = 2 x 2
-----------------------------------
The LCM of 4 and 5 is:
2 x 2 x 5
= 20
3/5 = (3 x 4)/(5 x 4) = 12/20
3/4 = (3 x 5)/(4 x 5) = 15/20
3/5 + 3/4
= 12/20 + 15/20
= 27/20
= 1 7/20
5 = 5
4 = 2 x 2
-----------------------------------
The LCM of 4 and 5 is:
2 x 2 x 5
= 20
3/5 = (3 x 4)/(5 x 4) = 12/20
3/4 = (3 x 5)/(4 x 5) = 15/20
3/5 + 3/4
= 12/20 + 15/20
= 27/20
= 1 7/20
2009-03-08 10:24 pm
(12+15)/20=27/20=1.35
收錄日期: 2021-05-01 12:08:46
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