The latter-the former has

1, 8 ,- 1, 10,-3

Let's look at the relationship between alternating numbers: odd numbers are less than 2 and even numbers are greater than 2. The number that is not set should be 12.

So the next step is 27+ 12=39.

2.

be the same as the above

-2 1,35,-27,4 1,-33

Odd number difference is 6, even number increases by 6, and the next number is 4 1+6=47.

So the next number is 533+47=580.

3.

be the same as the above

1, 16,-7,24,- 15

Odd number is 8, even number is 8, and the number is 24+8=32.

So the next number is: 1253+32= 1285.

This method is very special, I hope you can understand and apply it.