5 4/9 + 3 7/9, 4 1/3 + 8 1/4, 2 7/15 + 3 11/15, 6 9/10 + 1 2/5, 2 3/5 + 1 11/20 in simplest form?

5*(4 / 9) + 3*(7 / 9)

20 / 9 + 21 / 9

41 / 9

4*(1 / 3) +8*(1 / 4)

4 / 3 + 8 / 4

16 / 12 +24 / 12

40 / 12

20 / 6

10 / 3

2*(7 / 15) + 3(11 / 15)

14 / 15 + 33 / 15

57 / 15

19 / 5

6*(9 / 10) +12 / 5

54 / 10 +12 / 5

27 / 5 + 12 / 5

39 / 5

2*(3 / 5) + 1*(11 / 20)

6 / 5 + 11 / 20

24 / 20 + 11 / 20

35 / 20

7 / 4

- Please next time put your all quastions along each line

(without using { , }) to understand your problem very well and give you good answer. Good luck

Find the lowest common denominator and convert all the fractions. 1/10 = 12/120 1/6 = 20/120 1/3 = 40/120 3/10 = 36/120 1/4 = 30/120 1/2 = 60/120 7/8 = 105/120 4/5 = 96/120 3/4 = 90/120 9/10 = 108/120 3/5 = 72/120 3/8 = 45/120

What number is a multiple of 9, 4, 15, 10, 5, and 20 ?

20 is already a multiple of 4, 5, and 10 so forget about them.

What number is a multiple of 9, 15, and 20 ?

Try 9x20 = 180.

15x12 = 180.

So convert all the fractions to xxx/180 and add them up.

What you want to do is reduce to the lowest common denominator and then add the two fractions. These can't be reduced any more. Gary

83/9, 151/12, 31/5, 83/10, and 83/20.

set aside the whole numbers and get the Least Common denomitor of each fractions