номера 1197(2);1198(2)

Question

номера 1197(2);1198(2)

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Answer 1

1197(2):
1 2/5*2 5/7-1 2/5*3/14=7/5*19/7-7-5*3/14=19/5-3/10=38/10;19/5;3 целые 4/5
Ответ:3 4/5.

1198(2):
2-3 1/7*(2-1 9/11):8/21=2- 3 1/7*2/11:8/21=2-4/7:8/21=2-3/2=1/2
Ответ:1/2.