Explanation:
the key are always the 2 numbers in the middle.
you add number 2 to number 1 and put the result on top.
and you subtract number 2 from number 1 and out that result at the bottom.
starting with the example 3, -10 :
3 + -10 = 3 - 10 = -7 (goes on top).
3 - - 10 = 3 + 10 = 13 (goes at the bottom)
5, -3
5 + -3 = 5 - 3 = 2 (top)
5 - -3 = 5 + 3 = 8 (bottom)
18, ...
here we have the answers and need to find the original number.
let's call the missing number x.
I think 58 was put by you there and was originally empty. because 58 is not fitting to 22 below.
so,
18 - x = 22
x = 18 - 22 = -4
the missing number in the middle is -4.
and so the top is
18 + -4 = 18 - 4 = 14
two empty spots in the middle.
let's call the 2 missing numbers there x and y.
because the top and bottom numbers are given, we know :
x + y = -4
x - y = 8
x = y + 8
and we use this in the first equation :
y + 8 + y = -4
2y + 8 = -4
2y = -12
y = -6
x = y + 8 = -6 + 8 = 2
so, the 2 middle numbers from left to right are 2 and -6