Помогите №502(2,4,6,8)

Question

Помогите №502(2,4,6,8)

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Answer 1

2) (5+3)/8=8/8=1
4) (8+2)/15=10/15=2/3
6) (17-12)/25=5/25=1/5
8) (28-13)/45=15/45=1/3