4/5 - 1/10 + 1/6 - 1/30 =
= 8/10 - 1/10 + 5/30 - 1/3= (8-1)/10 + (5-1)/3= 7/10 + 4/3= 21/30 + 4/3= 25/30
Ответ: Г) 25/30
4/5 - 1/10 + 1/6 - 1/30 =
= 8/10 - 1/10 + 5/30 - 1/3
= (8-1)/10 + (5-1)/3
= 7/10 + 4/3
= 21/30 + 4/3
= 25/30
Ответ: Г) 25/30