Math homework help...?

[bam!]

please help me with this homework...

Find the lowest common denomnator for each of the following sets of numbers
1. 3/5 1/10
2. 2/3 3/8 1/2
3. 1/5 1/4 4/10
4. 2/3 5/9 5/5
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Change these numbers to improper fractions

12. 8 2/5
13. 12 2/3

add these problems and reduce answers to lowest terms. Change all improper fractions to mixed numbers.

14. 5/8 15. 2/5 16. 7/9
+ 5/8 + 4/5 +2/3

[gilvi]

1°
Find the lowest common denomnator for each of the following sets of numbers
1. 3/5 1/10 (LCM = 10)
2. 2/3 3/8 1/2 (LCM = 24)
3. 1/5 1/4 4/10 (LCM = 20)
4. 2/3 5/9 5/5 (LCM = 45)

2°
Change these numbers to improper fractions

12. 8 2/5 = (5*8 +2)/5 = 42/5
13. 12 2/3 = (3*12 + 2)/3 = 38/3

3°
add these problems and reduce answers to lowest terms. Change all improper fractions to mixed numbers.

14. 5/8 + 5/8 = (5+5)/8 = 10/8 = 5/4 = 1 1/4
15. 2/5 + 4/5 = (2+4)/5 = 6/5 = 1 1/5
16. 7/9 + 2/3 = (7+6)/9 = 13/9 = 1 4/3


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[Jansen d]

1.) (6/10 and 1/10) answer is 10
2.) (16/24 and 9/24 and 12/24) answer is 24
3.) (4/20 and 5/20 and 8/20) answer is 20
4.) (30/45 and 25/45 and 45/45) answer is 45

12.) ((8*5)+2)/5 = 42/5
13.) ((12*3)+ 2)/3 = 38/3

14.) 5/8 + 5/8 = 1 1/4
15.) 2/5 + 4/5 = 1 1/5
16.) 7/9 + 2/3 = 4/9