The LCM of 3 4 and 7 is 84.
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Pick two of the fractions and find the Least Common Multiple of those two denominators. Then take that number, and find the Least Common Multiple between that and the third denominator. This number will be the Least Common Denominator between the three fractions.If you don't care to find the Least common denominator, then just take the three denominators, and multiply them together.
Well, darling, the least common multiple of 4, 10, and 25 is 100. It's like finding the smallest number that these three can all cozy up to without any drama. So, there you have it - 100 is the magic number that keeps these three in check.
To add three fifths and seven tenths, we need to find a common denominator. The least common multiple of 5 and 10 is 10, so we convert three fifths to six tenths. Therefore, six tenths plus seven tenths equals thirteen tenths. Thirteen tenths can be simplified to one and three tenths, or 1.3 as a decimal.
Suggestion: Find the least common multiple using your favorite method (for example, prime factorization). Then multiply that by 1, by 2, and by 3, to get your answer.
The least common multiple of 9, 36, and 60 is the smallest number that can be divided by each of the three numbers without a remainder. In this case, the answer is 180. (180/60 = 3, 180/36 = 5, and 180/9 = 20)
84
119
3 * 7
LCM: 42
The LCM is: 210
The LCM is: 54
420
3 * 35 = 5 * 21 = 7 * 15 = 105
1197 21*57 = 1197 19*63 = 1197
The Least Common Multiple (LCM) of (54,63) is 378.
15
12