9 + 26 + 61 + 8 + 18 + 44 + 10 + 90 = 266
nine fifths 18/10 = 9/10 + 9/10 18/10 = 9/5
5/6 + 9/1 + 2/3 --> 15/18 + 162/18 + 12/18 = 189/18 --> 10 9/18 --> 10 1/2
18 + 10 + 28 + 10 = 66
20+18+13+9=60
18/10
9 + 26 + 61 + 8 + 18 + 44 + 10 + 90 = 266
nine fifths 18/10 = 9/10 + 9/10 18/10 = 9/5
few errors in your title: 2 plus 4 = 6 6 plus 9 = 15 10 plus 25 = 35 18 + 81 = 99
5/6 + 9/1 + 2/3 --> 15/18 + 162/18 + 12/18 = 189/18 --> 10 9/18 --> 10 1/2
9 + 9 + 10 + 10 = 38
-18
18 + 10 + 28 + 10 = 66
20+18+13+9=60
18 + 9 = 27
18 + 2 + 10 = 30
10/12 + 4/9= (90 + 48) / 108= 138/108= 23/18