Posted by Walter on Monday, February 14, 2011 at 11:32am.
1 - 1/2 + 1/3 - 1/4 + 1/5 - 1/6
You need to find the common denominator -- the smallest number divisible by each of the denominators.
One way to do that is to find the multiples of the largest.
6, 12, 18, 24, 30, 36, 42, 48, 54, 60
Ahh -- the common denominator is 60.
1/2 = 60/2 = 30/60
1/3 = 60/3 = 20/60
That should give you a good start.
Okay, Now that the common demoninator is 60, I now multiply. But where do I start? for example, I just leave the 1 alone because its a whole number. So now I multiply the 1/2 to 1 * 30 = 30 and 2 * 30 = 60 Do I do the same for the 1/3 and so on?
1/2 = 30/60
1/3 = 20/60
What do you think 1/4 equals?
1/4 = 15/60
1/5 = 12/60
What do you think?
solve 5/30+3/40+1/8
what is 5/30 + 3/40 + 1/8
what is 5/30 + 3/40 + 1/8
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