Plis help my (repli)!!!

Question

Plis help my (repli)!!!

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Answer 1

1) 3 1/14 - 2 5/21 = 3 3/42 - 2 10/42 = 2 45/42 - 2 10/42 = 35/42 = 5/6
2) 2,7 - 2,1 = 0,6 = 6/10
3) 5/6 • 6/10 = 1/2 = 0,5
Ответ 0,5