Today I watched a video from Khan Academy about adding fractions with different denominators.
The questions I did were:
9/10 + 1/6 = 1 1/15
1/2 + 11/12 = 11 5/12
3/4 + 1/5 = 19/20
The video talked about how you took the 2 fractions you were adding and found the highest common multiple of the two denominators- in 9/10 + 1/6 it was 30. Then to the 1 in 1/6, you did to the 1 what you did to the 6 to get to 30, which was multiply it by 5. It became 5/30. Then I did the same to the 9/10, and the question got changed to 27/30 + 5/30 = 32/30. Then you half it to simplify it, becoming 16/15. Since it's an improper fraction I made it 1 and 1/15.
This was not very interesting because I already knew how to do it, but it was interesting to see what questions I was given.