Tuesday

October 21, 2014

October 21, 2014

Posted by **Alex L.** on Sunday, October 9, 2011 at 9:05pm.

1) 8,9,12,18

2) 6,8,9,27,36

I have trouble factoring the denominators in this one.

3/7 + 2/5 + 1/10

- LCMs/Adding unlike fractions -
**Bandit**, Sunday, October 9, 2011 at 9:12pmtry a lcd of 70

- LCMs/Adding unlike fractions -
**Reiny**, Sunday, October 9, 2011 at 9:21pmThe LCM is that smallest whole number that each of your given numbers divide into

8 = 2x2x2

9 = 3x3

12 = 2x2x3

18 = 2x3x3

so looking at those, I will need three 2' and two 3's

LCM = 2x2x2x3x3 = 72

As to your second one,

7 = 1x7

5 = 1x5

10 = 2x5

So your lowest common denominator, or the LCM, is

7x5x2 = 70

- LCMs/Adding unlike fractions -
**Alex L.**, Monday, October 10, 2011 at 1:07pmI need to rewrite the fractions so that all the denominators are the same.

**Answer this Question**

**Related Questions**

algebra ! - i need hepl on adding and subtacting rational numbers like -7over12+...

math - in what way is subtracting fractions with unlike denominators like adding...

MATH - HOW DO LEAST COMMON MULTIPLES WORK. IT SAYS THERE IS A PROBLEM TO SOLVE ...

math - what is the least common denominator? It is the smallest number into ...

math - how do I find the numerators when I have 2 fractions with unlike ...

fractions with unlike denominators - What is a easy way to add or subbtract ...

math - adding fractions with unlike denominators: 7/9 + 5/6?

math - 5/10+12/16+(15/20-4/16) Well you need to solve in the parentheses first, ...

math - adding and subtracting fractions with unlike denominators

Math - I am trying to decide between 2 answers on a vocabulray question. The ...