4/5 - 1/10 + 1/6 - 1/30 =
= 8/10 - 1/10 + 5/30 - 1/30= (8-1)/10 + (5-1)/30= 7/10 + 4/30= 21/30 + 4/30= 25/30
Ответ: Г) 25/30
4/5 - 1/10 + 1/6 - 1/30 =
= 8/10 - 1/10 + 5/30 - 1/30
= (8-1)/10 + (5-1)/30
= 7/10 + 4/30
= 21/30 + 4/30
= 25/30
Ответ: Г) 25/30