Answer:
Box 2 : ( 1,5,3,10,9)
[(5-3)×1]-(10-9)
(2*1)-1 =1
Box 3 : {1,6,2,8,7,4}
(1+6+3 -7)- (8÷4) =
10-7-2 = 1
2) 1 · 5 + 9 - 3 - 10 = 1
3) 1 · 8 + 6 - 2 - 4 - 7 = 1
