15
LCD(7, 5, 10) = 10
Example: 1/30 and 1/42Their LCD is 210.Multiply each one by whatever it takes to make 210 in the denominator.30 x 7 = 21042 x 5 = 2101/30 x 7/7 = 7/2101/42 x 5/5 = 5/210
The LCD of 6, 5, and 7 is 210.
Example: 1/30 and 1/42Factor them.2 x 3 x 5 = 302 x 3 x 7 = 42Combine the factors, eliminating duplicates.2 x 3 x 5 x 7 = 210, the LCD
140
The LCD of 7 and 77 is 77.
Example: 1/30 and 1/42Factor them.2 x 3 x 5 = 302 x 3 x 7 = 42Combine the factors, eliminating duplicates.2 x 3 x 5 x 7 = 210, the LCD
Example: 1/30 and 1/42Factor them.2 x 3 x 5 = 302 x 3 x 7 = 42Combine the factors, eliminating duplicates.2 x 3 x 5 x 7 = 210, the LCD
15
The LCD for 4/7 and 3/5 is 35.
The same as with two.Example: 30, 42, 60Factor them.2 x 3 x 5 = 302 x 3 x 7 = 422 x 2 x 3 x 5 = 60Combine the factors, eliminating duplicates.2 x 2 x 3 x 5 x 7 = 420, the LCD
3
LCD(7, 5, 10) = 10
Example: 1/30 and 1/42Their LCD is 210.Multiply each one by whatever it takes to make 210 in the denominator.30 x 7 = 21042 x 5 = 2101/30 x 7/7 = 7/2101/42 x 5/5 = 5/210
Example: 1/30 and 1/42 Factor them. 2 x 3 x 5 = 30 2 x 3 x 7 = 42 Combine the factors, eliminating duplicates. 2 x 3 x 5 x 7 = 210, the LCD
The LCD of x, 5, 7, 15 is 105x.