1) 1 7/18 - 4/15 = 1 + 7/18 - 4/15 = 1 + 35/90 - 24/90 = 1 + 11/90 = 1 11/90
2) (4 + 4/5) * (4 + 1/6) = 4 + 4/5 + 4 + 1/6 = 8 + 4/5 + 1/6 = 8 + 24/30 + 5/30 = 8 + 29/30 = 8 29/30
3) 3 1/9 : 4 2/3 = 28/9 : 14/3 = 28/9 * 3/14 = 28/42 = 2/3.
1) 1 7/18 - 4/15 = 1 + 7/18 - 4/15 = 1 + 35/90 - 24/90 = 1 + 11/90 = 1 11/90
2) (4 + 4/5) * (4 + 1/6) = 4 + 4/5 + 4 + 1/6 = 8 + 4/5 + 1/6 = 8 + 24/30 + 5/30 = 8 + 29/30 = 8 29/30
3) 3 1/9 : 4 2/3 = 28/9 : 14/3 = 28/9 * 3/14 = 28/42 = 2/3.