1) 19/24 + 5/12 - 17/36 = (193)/(243) + (52)/(122) - (171)/(361)= 57/72 + 10/24 - 17/36= (57 + 30 - 34)/72= 53/72
2) 11/12 + 5/6 - 19/24 = (112)/(122) + (54)/(64) - (191)/(241)= 22/24 + 20/24 - 19/24= (22 + 20 - 19)/24= 23/24
3) 13/15 - 3/10 + 7/30 = (132)/(152) - (33)/(103) + (71)/(301)= 26/30 - 9/30 + 7/30= (26 - 9 + 7)/30= 24/30= 4/5
1) 19/24 + 5/12 - 17/36 = (193)/(243) + (52)/(122) - (171)/(361)
= 57/72 + 10/24 - 17/36
= (57 + 30 - 34)/72
= 53/72
2) 11/12 + 5/6 - 19/24 = (112)/(122) + (54)/(64) - (191)/(241)
= 22/24 + 20/24 - 19/24
= (22 + 20 - 19)/24
= 23/24
3) 13/15 - 3/10 + 7/30 = (132)/(152) - (33)/(103) + (71)/(301)
= 26/30 - 9/30 + 7/30
= (26 - 9 + 7)/30
= 24/30
= 4/5