@onemalaikaa 10+10 = 90
10 × 10 = 100
100 - 10 = 90
8+8 = 56
8×8= 64
64-8=56
6+6=30
6×6=36
36-6=30
4+4= 12
4×4= 16
16-4= 12
You need to multiple both numbers and take away same number just once, and then you'll get the answer.
If im wrong im gay i swear