5/7 and 2/3
3/4and5/18
1/2,1/3,and 1/4
1/9and5/6
2007-03-20 04:15:30 · 9 answers · asked by thatone 1 in Science & Mathematics ➔ Mathematics
a) When you have prime numbers as denomenators, the LCD is the product of those prime numbers. So it would be 7*3 = 21
b) Both numbers are divisible by 2, but the numerators aren't. So double the largest denominator - 18*2 = 36, which 4 also goes into. So it'd be 36.
c) When you have consecutive numbers, multiply them. In this case, it's easier because two goes into 12, so just go with that.
d) Both numbers are divisible by three. Find a number that is also divisible by three, and that will be your answer. Looks like this one would be 18.
2007-03-20 04:21:49 · answer #1 · answered by Brian L 7 · 0⤊ 0⤋
Get the multiples of the denominators, the smallest multiple common to them is the answer.
5/7 and 2/3, ans: 21
3/4and5/18, ans: 36
1/2,1/3,and 1/4, ans: 12
1/9and5/6, ans: 18
2007-03-20 04:32:49 · answer #2 · answered by Jan Francis M 2 · 0⤊ 0⤋
5/7 and 2/3: 21
3/4 and 5/18: 36
1/2, 1/3, and 1/4: 12
1/9 and 5/6: 18
2007-03-20 04:35:12 · answer #3 · answered by wahooyahoo 2 · 0⤊ 0⤋
15/21 and 14/21
27/36 and 10/36
6/12 , 4/12 and 3/12
2/18 and 15/18
2007-03-20 04:19:04 · answer #4 · answered by Doctor Q 6 · 0⤊ 0⤋
1) 21
2) 36
3) 12
4) 18
2007-03-20 04:17:59 · answer #5 · answered by Bhajun Singh 4 · 0⤊ 0⤋
21
36
12
18
I found them by doing prime factorization for the denominators.
2007-03-20 04:30:42 · answer #6 · answered by Ray 5 · 0⤊ 0⤋
21
36
12
18
2007-03-20 04:19:04 · answer #7 · answered by mike c 5 · 0⤊ 0⤋
do your own homework!!
2007-03-20 04:51:41 · answer #8 · answered by ohio gal 5 · 0⤊ 0⤋
LCD
21
36
12
18
- - - - - - - - - -s-
2007-03-20 04:37:59 · answer #9 · answered by SAMUEL D 7 · 0⤊ 0⤋